View source for Campaign

{{Status|Gameplay}}
{{References}}

[[File:HMCC-Main Menu.jpg|thumb|300px|The campaign menu in ''Halo: The Master Chief Collection''.]]
'''Campaign''' is the [[Wikipedia:Single Player|single player]] aspect of the [[:Category:Games|''Halo'' games]]. In each game, the player participates in various episodes of the [[Halo universe|''Halo'' storyline]]. The most recurrent character that players control is [[John-117|John-117, the Master Chief]], although roughly half of the ''Halo'' games focus on other characters and stories. The events of the ''Halo'' campaigns focus on the confrontation between [[humanity]] and the [[Covenant]], and also feature prominent interventions by other factions such as the [[Flood]] or the [[Forerunner]]s.

Campaign levels usually consist of missions in which the player kills enemies while going through the level's areas and completing given objectives, where the story is established with cutscenes and in-game dialogues. [[Cooperative play]] is available in most but not all games, but the number of players can vary. Different difficulty options ([[Easy]], [[Normal]], [[Heroic]], [[Legendary]]) and gameplay modifiers ([[skulls]], [[Campaign scoring|scoring]]) also exist. The additional [[Spartan Ops]] mode in ''Halo 4'' is loosely based on a campaign and continues the game's story.

Most ''Halo'' games are [[:Wikipedia:First-person shooter|first-person shooters]] where the player controls a single character. The ''Halo Wars'' series are [[:Wikipedia:Real-time strategy|real-time strategy]] games, in which the player can take control of dozens of troops and units at a time. ''Halo: Spartan Assault'' and ''Spartan Strike'' are top-down isometric shooters.

==Campaigns==
===''Halo: Combat Evolved''===
{{Quote|While the Covenant had us locked up in here, I overheard the guards talking about this ring world. They call it... Halo.|Captain [[Jacob Keyes]] after being [[Raid on the Truth and Reconciliation|rescued]] by Master Chief Petty Officer John-117.{{Ref/Level|CE|The Truth and Reconciliation}}}}
[[File:Halo-combat-evolved.jpg|thumb|250px|Campaign promotional image for ''Halo: Combat Evolved''.]]
{{Main|CE|Halo: Combat Evolved Anniversary}}

In ''Halo: Combat Evolved'', the player takes control of the [[John-117|Master Chief]]. Co-op play allows a second player (also playing the Master Chief) to join in split-screen or system link. In ''Halo: Combat Evolved Anniversary'', the second player can join via [[Xbox Live]]. There are ten levels, which can be played on four difficulties. ''Anniversary'' also adds [[CEA:Terminals|Terminals]], [[CEA:Skulls|Skulls]], and the possibility to switch between old and new graphics.

The campaign is set in [[2552#September|September 2552]], as the [[United Nations Space Command|UNSC]] is embroiled in the twenty-eighth year of a [[Human-Covenant War|genocidal war]] started by the alien hegemony known as the [[Covenant]]. The plot revolves around the crew of the {{UNSCShip|Pillar of Autumn}}, a ship that has escaped the catastrophic [[Fall of Reach|Battle of Reach]], only to stumble upon [[Installation 04]], a [[Halo Array|Halo ringworld]] in uncharted space, something the Covenant believe will act as a [[H2:The Great Journey|gateway to Godhood]]. The Covenant attempt to destroy the ''Autumn'', but fail, allowing survivors to reach the ring. With the Covenant in pursuit, the Master Chief, alongside his AI companion [[Cortana]], gathers the human survivors and engages the enemy on the surface of Halo, recovering the ''Autumn''{{'}}s [[Captain (NAVCOM)|Capitan]], [[Jacob Keyes]], while trying to uncover the ring's origin and true purpose. However, the [[Flood]], an all consuming parasite, are revealed after breaking containment and begin spreading across the ring. Attempting to stop the spread of the Flood, the [[343 Guilty Spark|monitor]] of the ring tries to convince Chief to fire the Halo to kill the flood. However, as they reach the Halo's [[Control Room]], Cortana reveals that Halo is a superweapon designed to prevent the spread of the Flood, capable of destroying every sentient lifeform in the galaxy if activated. Learning this, Chief and Cortana set out to destroy the ring, with Chief detonating the ''Autumn''{{'}}s [[Fusion reactor]] to destroy Halo, with him and Cortana narrowly escaping the ringworld's destruction.
{{Clear}}

===''Halo 2''===
{{Quote|no=two|q1=I will continue my campaign against the humans!|Thel 'Vadamee|q2=No. You will not.|High Prophet of Truth|Thel 'Vadamee's campaign in ''Halo 2'' was focused against Heretics, the Flood, and eventually the Covenant.{{Ref/Level|H2|H2:The Heretic|The Heretic}}}}
[[File:Halo 2 028.jpg|250px|thumb|left|Campaign promotional art for ''Halo 2''.]]
{{Main|H2|Halo 2: Anniversary}}

In ''Halo 2'', the player alternates between control of the [[John-117|Master Chief]] and [[Thel 'Vadam|the Arbiter]]. Co-op allows a second player to join the game in split-screen or system link (or via Xbox Live in ''Halo 2: Anniversary''). Both players control the same character around whom the level focuses (ie: two Master Chiefs, or two Arbiters). There are fifteen levels (an introductory cutscene, a tutorial and thirteen full-fledged missions), playable on four different difficulties, and there are [[H2:Skulls|Skulls]] as gameplay modifiers. ''Halo 2: Anniversary'' adds [[H2A:Terminals|Terminals]] and additional [[MCC:Skulls|Skulls]] along with the possibility to switch between old and new graphics.

The campaign is set in [[2552#October|October 2552]], with The Master Chief having returned to [[Earth]] after the destruction of [[Installation 04]], aboard [[H2:Cairo Station|Cairo Station]]. Meanwhile, aboard the Covenant's holy city, ''[[High Charity]]'', the Covenant [[Supreme Commander|commander]] who failed to protect Halo is branded a heretic. The Covenant finally discover and [[Battle of Earth|attack]] Earth, prompting the Chief to [[Battle of Mombasa|defend]] the Cairo and the city of [[Mombasa]], [[Kenya]]. Meanwhile, the deposed Elite, [[Thel 'Vadam|Thel 'Vadamee]] becomes the [[Arbiter]] and is sent by the [[Hierarchs]] to quell a [[Sesa 'Refumee's heretic faction|rebellion]] against the Covenant, retrieving the [[343 Guilty Spark|monitor]] of the destroyed Halo. On Earth, the {{UNSCShip|In Amber Clad}}, with the Chief aboard, pursues the ship of the [[Prophet of Regret]], only to arrive at a new Halo ring, [[Installation 05]]. The Chief sets out to kill the Covenant Prophet, and successfully does so, while the Arbiter is sent to retrieve the [[activation index]] to secure Halo's activation, before being backstabbed by [[Tartarus]], Chieftain of the Jiralhanae. Both end in the clutches of the [[Gravemind]], the Flood's central intelligence, who orders them to stop the ring's activation. The Covenant fall into a [[Great Schism|civil war]] as the Hierarchs order the [[Jiralhanae|Brutes]] to betray the [[Sangheili|Elites]]. The Arbiter manages to defeat Tartarus by forming an alliance with the humans. Meanwhile, the Master Chief is forced to abandon Cortana on ''High Charity'', as it is being infested by the Flood, and chases after the last Covenant Hierarch, the [[Prophet of Truth]], who departs to Earth.
{{Clear}}

===''Halo 3''===
{{Quote|no=two|q1=What we should do [[Miranda Keyes|Commander]], is understand - clearly - that this is humanity's final stand - here - at Earth. We go, we risk everything; every last man, woman and child. If we stand our ground, we might just have a chance.|Lord Hood|q2=No. If your [[Cortana|construct]] is wrong, then the Flood has already won.|Thel 'Vadam|Humanity and the Sangheili plan their operation against the Covenant and the Flood.{{Ref/Level|H3|H3:Floodgate|Floodgate}}}}
[[File:Halo 3 - Cooperative.jpg|thumb|250px|The four characters playable in co-op in the ''Halo 3'' campaign.]]
{{Main|Halo 3}}

In ''Halo 3'', the player takes control of the [[Master Chief|John-117]]. Co-op allows two players in split-screen, and up to four players in system link or Xbox Live. The second, third, and fourth players respectively take control of the [[Arbiter|Thel 'Vadam]], [[N'tho 'Sraom]] and [[Usze 'Taham]]. It is one of only two ''Halo'' games in which the co-op mode has a canonical explanation. There are ten levels playable (an introductory cutscene and nine playable missions). The player can find [[H3:Terminals|Terminals]] and [[H3:Skulls|Skulls]], and change the game's difficulty either with the four traditional difficulties or with the Skulls. It is also the first game to introduce [[campaign scoring]]. Another feature it added was the Rally Point system which allows the player to choose where in the mission they start from with most having two or three rally points (including the option of "mission start" which is labeled as Rally Point Alpha in the MCC version of Halo 3, Halo 3 ODST and Halo 4) at important areas of a mission, such as just after a cutscene or when the player would have moved to a new area of the map, such as the cutscene after defeating 343 Guilty Spark in Halo or the area after the broken bridge in Tsavo Highway, labeled as the broken path.

The campaign is set in [[2552#November|November 2552]], as the Master Chief returns to Earth to stop the Prophet of Truth. After being retrieved by the [[United Nations Space Command|UNSC]], and fighting at [[Crow's Nest (location)|a UNSC airbase]], he is sent to the besieged city of [[Voi]] to destroy the Covenant's heavy defenses. The UNSC fleet then launches an attack on Truth's [[Forerunner dreadnought|Forerunner ship]], but he manages to activate the [[Excession|Portal]] and departs to [[Installation 00|the Ark]] to activate the [[Halo Array]] and begin [[Covenant religion|The Great Journey]]. Suddenly, the Flood arrive on Earth, but are eradicated with the help of the Elites. The UNSC and the Elites join their forces and battle the last Covenant forces on the Ark, culminating in the assassination of the [[Prophet of Truth]]. However, the flood, having reached The Ark via ''[[High Charity]]'', land on the installation and begin to spread. Chief enters the remains of High Charity, retrieves Cortana and they set out to activate a newly built Halo ring, [[Installation 08]], to destroy the local infestation. They successfully light the ring, but during the escape, the {{UNSCShip|Forward Unto Dawn}} is cut in half by the [[Slipspace portal|Portal]], with the forward section crashing on Earth with the Arbiter and the aft section being lost in space, with the Chief and Cortana aboard. The Spartan waits in cryosleep until the UNSC find and rescues them, and the [[Human-Covenant War]] is declared over, with a ceremony in remembrance of the lives lost during the war.
{{Clear}}

===''Halo Wars''===
{{Quote|Captain's report, February 4, 2531. Five years, five long years. That's how long it took us to get Harvest back...|Captain [[James Cutter]] on the [[Harvest campaign]].{{Ref/Level|HW|HW:Alpha Base|Alpha Base}}}}
[[File:HaloWars XboxPromo.jpg|thumb|left|250px|Campaign promotional art for ''Halo Wars''.]]
{{Main|Halo Wars}}

Halo Wars was Halo's first [[real-time strategy]] game. The player takes control of [[Captain (NAVCOM)|Captain]] [[James Cutter]]. Two player online Co-op for the campaign story is available in the game in Xbox Live link. Player two also controls Captain Cutter as the leader of an original campaign. The campaign consists of 15 Missions and can be played on four difficulties, and has [[HW:Skulls|skulls]] that can be found throughout, acting as gameplay modifiers. 

The campaign is set in [[2531#February|February]] and [[2531#March|March 2531]]. It begins with Sergeant [[John Forge]], a Marine aboard the ship {{UNSCShip|Spirit of Fire}}, on the planet [[Harvest]], engaging the [[Covenant]] to secure a [[Forerunner]] relic site for Professor [[Ellen Anders]] to examine, with the information gathered showing that the Covenant are heading to the [[Human colonies|colony]] of [[Arcadia]], where Forge assists in evacuating civilians. The [[United Nations Space Command|UNSC]] then attacks a Covenant site, with Anders and Forge documenting the area, only for [[Arbiter]] [[Ripa 'Moramee]] to arrive and take Anders prisoner. Following them, the ''Spirit of Fire'' emerges over [[Trove|a mysterious planet]]. Searching for Anders, the UNSC forces come under attack from the [[Flood]].  They retreat to the Spirit of Fire which then emerges inside a massive [[Shield World]]. Meanwhile, the Arbiter uses Anders to reveal [[Apex Site|an installation]] with a fleet of [[Forerunner dreadnought|Forerunner warships]]. Anders manages to escape, linking up with Forge and his Marines. Removing the ''Spirit of Fire''{{'}}s [[Shaw-Fujikawa Translight Engine|FTL drive]], the UNSC move it into the installation, planning to detonate it, which would the [[Korinth Prior system|system's]] star to go [[supernova]], destroying the fleet. The Arbiter attempts to stop them, but is killed by Forge, who stays behind to detonate the reactor, while the rest of the UNSC forces escape on ''Spirit of Fire''. Now unable to return to human space, the crew enter [[Cryo-chamber|cryonic storage]]. In a post credits scene, Serina is be heard saying, "Captain. Wake up. Something has happened."
{{Clear}}

===''Halo 3: ODST''===
{{Quote|You know the music. Time to dance!|Gunnery Sergeant [[Edward Buck]] to the rest of [[Alpha-Nine]].{{Ref/Level|ODST|Prepare to Drop}}}}
[[File:The Squad.jpg|thumb|250px|Campaign promotional art for ''Halo 3: ODST''.]]
{{Main|Halo 3: ODST}}

In Halo 3: ODST, the player primarily takes control of [[Jonathan Doherty|the Rookie]], but also takes control of the different members of the [[65th Shock Troops Division]]. Co-op allows for up to four players over Xbox LIVE or System Link. There are ten levels, which are playable on four difficulties, with [[Skulls]] added to the game with the addition of the game to [[Halo: The Master Chief Collection]]. The player can also find [[H3ODST:Audio log|audio logs]] to uncover [[Sadie's Story|a secret story]].

The campaign is set in [[2552#October|October  2552]]. It begins on the {{UNSCShip|Say My Name}} above [[New Mombasa]], [[Earth]], where a group of [[Orbital Drop Shock Trooper|ODSTs]], [[Taylor H. Miles|Dutch]], [[Kojo Agu|Romeo]], [[Michael Crespo|Mickey]], [[Edward Buck]], the Rookie, and an [[Office of Naval Intelligence|ONI]] operative [[Veronica Dare]], are preparing to assault the [[Prophet of Regret]]'s [[Covenant assault carrier|assault carrier]]. The ODSTs drop from the ship, but before they can land, the assault carrier enters [[Slipstream space|slipspace]], sending the drop pods out of control, and causing the Rookie's pod to collide with Mickey's pod, knocking the Rookie unconscious. The Rookie later wakes up and heads into the city to find his squad. Fighting Covenant patrols throughout the city, he encounters the [[Superintendent]], a [[dumb AI|"dumb"]] [[Artificial intelligence|AI]] tasked with maintaining the city, that begins to help him. The Rookie begins to find clues regarding the fate of his squadmates. When the Rookie finds a clue, the game's perspective shifts to that of the relevant ODST, before returning to the Rookie once the level is complete. Eventually, the Rookie, having made his way to the Superintendent's [[New Mombasa Data Center|Data Center]], finds Dare locked in on sub-level nine. They fight their way to the data center, and find a [[Huragok]], which has combined its knowledge with the information possessed by the Superintendent. They escape the data core, alongside Buck, and attempt to reach a stolen {{Pattern|Kez'katu|Phantom}} waiting in the shipyards down the [[New Mombasa Waterfront Highway|coastal highway]], but are forced to take cover. Buck orders Mickey to provide extraction, and after fighting waves of Covenant forces, the group escapes, narrowly avoiding a Covenant carrier's glassing beam. The game ends with [[Sergeant Major]] [[Avery Junior Johnson|Avery Johnson]] interrogating the Huragok, and The [[Prophet of Truth]] overseeing more Huragok uncover an extensive [[Forerunner]] [[Excession|complex]] beneath the planet's surface.
{{Clear}}

===''Halo: Reach''===
{{Quote|no=two|q1=You want to know if we're losing?|Carter-A259|q2=I know we're losing! I want to know if we've lost.|Kat-B320|[[NOBLE Team]] Commander [[Carter-A259]] and Lieutenant Commander [[Kat-B320]] during the [[Siege of New Alexandria]].{{Ref/Level|HR|Reach:New Alexandria|New Alexandria}}}}
[[File:Noble Team.jpg|thumb|left|250px|Campaign promotional art for ''Halo: Reach''.]]
{{Main|Halo: Reach}}

In Halo: Reach, the player takes control of [[SPARTAN-B312|Spartan-B312]], also known as Noble 6, who is a recent addition to [[NOBLE Team]]. Noble 6 is represented by the player's multiplayer Spartan. In co-op, other players are also represented by their multiplayer spartan. Halo: Reach supports online multiplayer as well as split-screen. The original Halo: Reach also supports Campaign matchmaking, has eleven missions that can be played in four difficulties and has [[Reach:Skulls|skulls]] that can be found throughout the game. The player can also find [[Data pads]] throughout the campaign.

The campaign is set in [[2552#July|July]] and [[2552#August|August 2552]], just before the events of Halo: Combat Evolved. Spartan-B312, who recently arrived on the colony of [[Reach]], meets up with NOBLE Team to investigate a disturbance at [[Visegrád Relay|Visegrád relay Outpost]]. However, they find the Covenant there. NOBLE Team, which included [[Carter-A259|Carter]], [[Catherine-B320|Kat]], [[Jun-A266|Jun]], [[Emile-A239|Emile]], and [[Jorge-052|Jorge]], all of whom are [[SPARTAN-III program|Spartan-IIIs]], except for Jorge. They fight against the Covenant invasion in various places, and eventually Noble 6 and Jorge make their way inside a Covenant cruiser. Jorge sacrifices his life to destroy the cruiser, throwing Noble 6 down to Reach. However, it is in vain, because the largest Covenant fleet the UNSC has ever seen arrives. NOBLE Team regroups in [[Reach:New Alexandria|New Alexandria]], but a Covenant ship fires its glassing beam. As the city begins to get glassed, Kat is killed by a [[Gadulo-pattern needle rifle|needle rifle]]. The remaining members make their way to [[SWORD Base]] and meet with [[Dr. Catherine Halsey]], the creator of the [[SPARTAN-II program|Spartan-IIs]]. She gives an [[Artificial Intelligence|AI]] known as [[Cortana]] to Noble-6 and tells him to get it to the {{UNSCShip|Pillar of Autumn}}. Jun takes Halsey and somehow they make their way off of Reach. Noble-6, Emile, and Carter make their way towards the Pillar of Autumn, but they encounter a Scarab. Carter crashes his Pelican into the Scarab to destroy it, sacrificing himself. Emile and Noble 6 make their way to the Pillar of Autumn, and give Cortana to [[Captain (NAVCOM)|Captain]] [[Jacob Keyes|Keyes]]. However, they have to fight off Covenant Phantoms and destroy a cruiser with a MAC Cannon. Emile dies fighting off Elites. The Pillar of Autumn leaves Reach, and Noble 6 fights until his last breath. The epilogue, set in the year [[2589]] on a re-[[Terraforming|terraformed]] Reach, shows Noble Six's helmet sitting in what is now a grassy field, with Dr. Halsey providing a eulogy to Noble Team.
{{Clear}}

===''Halo 4''===
{{Quote|Time was your ally, human, but now it has abandoned you. The Forerunners... have returned.|The [[Ur-Didact]] thanks John-117 for releasing him from his [[cryptum]].{{Ref/Level|H4|H4:Forerunner|Forerunner}}}}
[[File:H4 JohnandCortana Concept.jpg|thumb|250px|Campaign promotional art for ''Halo 4''.]]
{{Main|Halo 4}}

In Halo 4, the player takes control of the Master Chief. Co-op play allows two players to play in split-screen, and up to four players to join via Xbox Live or system link. It was the first original Halo game created by [[343 Industries]]. The campaign has 10 missions, (two cinematic and eight gameplay missions), can be played in four difficulties and has [[H4:Skulls|skulls]] that can be collected in the campaign, alongside [[H4:Terminals|Terminals]].

The campaign is set in [[2557#July|July 2557]] on the {{UNSCShip|Forward Unto Dawn}}, above the [[Forerunner]] [[Shield world]] [[Requiem]]. [[Cortana]] wakes [[John-117|Chief]] from [[Cryo chamber|cryo-sleep]] to search for the cause of the ship's alarms activating, encountering [[Jul 'Mdama's Covenant|former Covenant]] forces attacking the frigate. While fending them off, they crash land on the shield world after entering its gravity well. They recover, and attempt to make their way back to Earth in order to find a cure for Cortana's [[Rampancy]]. They set out to find a way to contact the [[United Nations Space Command|UNSC]], encountering more Covenant forces, as well as [[Prometheans]], before reaching Requiem's core and freeing the [[Ur-Didact|Didact]] from his [[Cryptum]] with the Covenant then quickly allies with the Didact and his Prometheans.  Chief and Cortana escape, but emerge to the {{UNSCShip|Infinity}} being pulled into the planet. They regroup with UNSC forces and fight against the Didact and the Covenant, before the Didact retreats. The pair set out to destroy the planet's gravity well, but Chief is confronted with a vision from the [[Librarian]], who warns him of the Didact's plans to use the [[Composer]], a device that extracts the soul from a person to turn them into Prometheans. They destroy the gravity well, but Chief stays behind, commandeering a [[D79H Pelican|Pelican]] to attempt to destroy the Didact's cryptum. This  proves unsuccessful, as the Didact leaves Requiem with his ship, the ''[[Mantle's Approach]]'', to [[Ivanoff Station]], to prevent the Didact from acquiring the Composer, but fail. With the Composer in the Didact's possession, Chief and Cortana attempt to destroy the mantle's approach, and with it the composer, with a [[HAVOK tactical nuclear weapon|nuke]], to prevent the Didact from composing the city of [[New Phoenix]]. Chief confronts the Didact once again, and Cortana sacrifices herself so he can kill the Didact and destroy the composer. With the last of her power, Cortana teleports John away from the vessel before fading away. Chief drifts in space before being found by the ''Infinity'' and returning to [[Earth]].

====''Spartan Ops''====
Spartan Ops is an episodic cooperative campaign that acted as the replacement for [[Firefight]]. In Spartan Ops, the player takes control of [[Fireteam Crimson]], and features ten episodes, each with five chapters.

The campaign is set in [[2558#February|February 2558]], with the {{UNSCShip|Infinity}} dispatched to reclaim [[Requiem]] from [[Jul 'Mdama's Covenant faction|Covenant]] forces. Once there, ''Infinity'' engages the Covenant fleet and deploys ground forces, including [[Fireteam Majestic|Fireteams Majestic]] and Crimson, sending them on many different operations. During one of these, Fireteam Crimson uncover a [[Forerunner]] [[Requiem translocation artifact|slipspace artifact]], which once brought aboard the  ''Infinity'' disrupts the ship's systems and teleports [[Henry Glassman|Chief Engineer Henry Glassman]] to Requiem's surface, with [[Catherine Halsey|Dr. Catherine Halsey]] investigating the event. It then begins transmitting data about the ship to Requiem, and is intercepted by [[Jul 'Mdama]], with him taking Glassman captive. Fireteam Crimson secure another Forerunner artifact, the [[Didact's Gift]], which contains the memories of [[Promethean Knight]]s formed from the victims of the [[Ur-Didact|Didact's]] [[New Phoenix Incident|attack on New Phoenix]]. Investigating the first artifact, Spartan [[Gabriel Thorne]] is teleported to [[the Cauldron]], inside of Covenant territory. Dr. Halsey begins unknowingly talking with Jul 'Mdama, who is manipulating her to learn Forerunner secrets. Halsey is apprehended while Spartan Thorne rescues Dr. Glassman. Halsey then briefly escapes imprisonment before being captured by Covenant and Promethean forces, taking her to the Librarian's "shrine".  [[Admiral]] [[Serin Osman]], head of the [[Office of Naval Intelligence|ONI]], orders [[Captain (NAVCOM)|Captain]] [[Thomas Lasky]] to assassinate Halsey, but he sends Fireteam Majestic to rescue her. Meanwhile, Halsey enters the Librarian's shrine, and the Librarian's essence gives her an artifact known as the [[Janus Key]], but one half is taken by Jul 'Mdama. Believing to have obtained what he was looking for, Jul 'Mdama launches Requiem into its sun, with the ''Infinity'' narrowly escaping. Dr. Glassman then studies his half of the Janus Key while Halsey seemingly agrees to collaborate with Jul 'Mdama.
{{Clear}}

===''Halo: Spartan Assault''===
{{Quote|Greeting, Spartan. I'm Roland, UNSC Infinity's AI. We're going to study the historical battles in hopes of increasing your tactical skills for the future. As a bonus, it's a pretty fun game you can play in your spare time. So let's get to it.|[[Roland]] explaining the [[TACSIM]] to a Spartan-IV.{{Ref/Game|HSA|Operation A: Umbra}}}}
[[File:HSA-Cinematic-Horizon.jpg|thumb|left|250px|[[Sarah Palmer]] in one of the cinematics of ''Halo: Spartan Assault''.]]
{{Main|Halo: Spartan Assault}}

Halo: Spartan Assault was Halo's first Isometric shooter, and the first Halo game designed for mobile, before eventually being released on console. The player takes control of Spartans [[Sarah Palmer]] and [[Edward Davis]]. The console versions also include a two-player online Co-op mode, where two Spartans battle against hordes of [[Flood]] across five missions. The campaign is divided into six chapters called Operations, with five missions each, and has campaign scoring, with bronze, silver or gold stars for beating various par scores in each mission, alongside [[HSA:Skulls|skulls]] as gameplay modifiers.

The campaign is set in [[2554]]. It begins with the {{UNSCShip|Infinity}}'s [[AI]] [[Roland]] giving several [[Spartan-IV]]'s a lesson on historical battles, focusing on the [[Battle of Draetheus V]], started by a  [[Merg Vol's Covenant|splinter sect of Covenant]] led by [[Sangheili]] [[Zealot]] [[Merg Vol]]. Vol led a fleet of ships to the planet and to capture Draetheus V and its [[moon]] [[X50]]. Palmer and Davis led the UNSC in defending the planet from Merg Vol's Covenant, engaging his forces on X-50, but were unsuccessful due to Vol's overwhelming forces, with Vol's Covenant taking the moon. While Davis stayed behind to defend the moon, Palmer remained on Draetheus V to defend against the Covenant forces, assassinating several of Vol's officers. Meanwhile, Davis discovered that X50 was not a natural moon, but a [[Forerunner]] megastructure capable of constructing and destroying planets. FInding his way into the control center, Merg Vol activated X50's main weapon on Draetheus V and began to dismantle the planet, with the UNSC evacuating as many civilians as possible. In a stroke of luck, the {{UNSCShip|Eminent Domain}} was able to outmaneuver Covenant forces and deploy [[ODST]]s, who managed to reach Davis. Davis then connected with UNSC technicians who believed they could render the Forerunner structure inert. Davis and the remaining Marines assisted the combat technicians securing the Forerunner structure, but despite being successful, it was too late, as Draetheus V was already breaking apart, and Davis was killed by overwhelming [[Sangheili]] forces. Palmer then focused on assassinating Vol, stealing a {{Pattern|R'shwupa|Phantom}} belonging to [[Parg Vol|Vol's brother]] and landing on X-50. Navigating the structure's emergency defences and Covenant forces, Palmer executed Vol and sabotaged the device on X50. Later, investigating transmissions from X-50, Palmer discovered a message from Spartan Davis, moments before his death, and that Davis' final impressions had been absorbed into a [[Durance|Forerunner device]]. She shut the device down in order to allow her friend to pass away peacefully.
{{Clear}}

===''Halo: Spartan Strike''===
{{Quote|Our combat simulation is up and running, so let's see how you do playing through this operation as a lone Spartan. Good luck!|Roland prepares a TACSIM for a Spartan-IV.{{Ref/Game|HSS|Operation A: Orphic Spear}}}}
[[File:SpartanStrikeBanner.jpg|thumb|250px|Campaign promotional art for ''Halo: Spartan Strike''.]]
{{Main|Halo: Spartan Strike}}

In Halo: Spartan Strike, the player takes control of an [[Unidentified Spartan-IV]] before taking control of an [[Unidentified Headhunter]]. It is the first Halo game to not feature campaign Co-op. The campaign is divided into five chapters called Operations, with six missions each, sharing Halo: Spartan Assault's campaign scoring, alongside [[HSS:Skulls|skulls]] as gameplay modifiers.

The campaign is set in [[2557]], with the unnamed Spartan-IV simulating the actions of an [[Orbital Drop Shock Trooper|ODST]] [[Alpha-Five|squad]] sent to secure a Forerunner artifact called the Conduit during the Battle of Mombasa from the [[Covenant]]. They retrieve a [[data pad]] containing intel on the Conduit's location and recover it. The Covenant then launches an assault to recover the Conduit, and a Sangheili [[Field Master]] recovers it, only to be killed, and the Conduit retaken, by the Spartan. The Spartan is ordered to bring the Conduit to a research facility in New Phoenix, but is caught in the slipspace rupture of the [[Solemn Penance]], with the simulation ending, and Roland revealing that the ODSTs were killed by the slipspace rupture. The Conduit was never found and was presumed destroyed until a faint signal originating on [[Installation 03|Gamma Halo]] was detected. In response, the player, now simulating the Headhunter, is sent to investigate, discovering that the source originated from the Conduit, and [[Jul 'Mdama]]'s [[Jul 'Mdama's Covenant|new "Covenant"]] have also detected it. He destroys Covenant jammers and uses a stolen {{Pattern|Zurdo|Wraith}} to find the Conduit, only to learn this signal was a decoy. Finding the Conduit's true location, the Spartan leaves the area, learning that the Conduit is capable of opening Forerunner [[slipspace portal]]s and enter slipspace to save itself—such as at   New Mombasa. Meanwhile, 'Mdama's Covenant discovers the [[Altar]], where they plan to use the Conduit to open slipspace portals all across Gamma Halo for their [[Promethean]] allies to take control of the Halo from the UNSC. The Spartan attempts to travel to the Altar in a Pelican, but is shot down. He survives and fights past Covenant forces, before using a [[M808 Scorpion|Scorpion]] to reach the Altar. The Spartan kills all Covenant forces at the Altar, and reclaims the Conduit, returning to [[Ivanoff Station]] with it. However, the Spartan receives an emergency distress call from an [[New Phoenix ONI facility|ONI facility]], where a [[unidentified Forerunner machine|Forerunner artifact]] was being studied, that a portal has opened there, causing Covenant and Promethean to [[Battle of New Phoenix|invade]] the city. The Spartan arrives and defeats the Covenant and Promethean forces, using the Conduit to close the portal, though it makes a slipspace jump and is lost.

====Operation E: Brother's Keeper====
If all the missions from the previous Operations are completed with Gold stars, this Operation is unlocked, revealing a hidden concurrent narrative alongside the main game.

In Operation E: Brother's Keeper, the player takes control of another Unidentified Spartan IV, and begins in New Mombasa, rescuing a squad of Marines with vital intel before locating a downed [[AV-14 Hornet|Hornet]] with  a series of [[Forerunner]] [[glyph|glyphs]] stolen from the [[The Covenant|Covenant]]. The campaign then shifts to   Gamma Halo, with the Spartan establishing a [[Forward Operating Base|forward operating base]] to explore the ring, before assaulting Covenant forces attempting to use the Conduit to attack Earth. The Spartan is then brought to New Phoenix to help defend the ONI facility to prevent New Phoenix from being overrun by Promethean forces.
{{Clear}}

===''Halo 5: Guardians''===
{{Quote|no=two|q1=Cortana's our concern now, sir.|Jameson Locke|q2=Like hell she is.|John-117|Spartan [[Jameson Locke]] attempts to arrest an AWOL John-117.{{Ref/Level|H5G|H5G:Unconfirmed|Unconfirmed}}}}
[[File:Halo 5 Guardians.jpg|thumb|left|250px|Campaign promotional art for ''Halo 5: Guardians''.]]
{{Main|Halo 5: Guardians}}

In Halo 5: Guardians, the player alternates between control of the [[Master Chief|John-117]] and Spartan [[Jameson Locke]]. Co-op allows for up to four players via Xbox live. When playing as the Master Chief, players on co-op will play as members of [[Blue Team]] ([[Frederic-104]], [[Kelly-087]] and [[Linda-058]]), while when playing as Locke, they will play as members of [[Fireteam Osiris]] ([[Holly Tanaka]], [[Edward Buck]] and [[Olympia Vale]]). It is the second Halo game in which co-op has a canonical explanation. The campaign has fifteen missions, (three weapons down and twelve gameplay missions), can be played in four difficulties and has [[H5G:Skulls|skulls]] that can be collected in the campaign, alongside [[Mission Intel|audio logs]].

The campaign is set in [[2558#October| October 2558]], and begins following Locke as Fireteam Osiris is deployed to [[Kamchatka]] to extract [[Dr. Catherine Halsey]] from [[Jul 'Mdama]]'s [[Jul 'Mdama's Covenant|forces]]. Osiris succeed, recovering Halsey to the {{UNSCShip|Infinity}}, and killing 'Mdama. Meanwhile, Chief and Blue Team reacg the [[Office of Naval Intelligence|ONI]] research vessel [[Argent Moon]] to prevent Covenant forces from utilising its research. Chief has a vision of [[Cortana]], and after destroying the vessel, goes rogue to find her. Halsey, worried that Cortana is manipulating Chief, sends Osiris after Blue Team to bring them back. Arriving at [[Meridian]], they fight the [[Promethean]] forces on the planet, including the [[Warden Eternal]], Cortana’s servant, and find Blue Team. Locke fights Chief, but loses, and Blue Team go through a [[Slipstream space|slipspace]] [[Slipspace portal|portal]] while Osiris extract from Meridian, avoiding the [[Guardian]] activated under the planet. Blue Team, after arriving on [[Genesis]], are contacted by Cortana, who explains that her [[rampancy]] was cured by [[The Domain]], telling them to meet her at the Domain's access point. Meanwhile, Osiris fight alongside [[Thel 'Vadam|the Arbiter]] on [[Sanghelios]] against ex-Covenant forces. Acquiring a [[Constructor Sentinel]], they reprogram it to activate the Guardian on [[Sunaion]], and fight to reach the Guardian before it activates. They reach it in time, and teleport away, while the Arbiter clears up the remaining Covenant forces. Osiris arrive on Genesis, and with the help of [[031 Exuberant Witness|it's]] [[Monitor]], fight to reach Blue Team. Blue Team, after reaching The Domain, fight through Promethean forces, including multiple Wardens, before reaching Cortana. However, Cortana, believing that [[Artificial Intelligence|AI's]] should hold the [[Mantle of Responsibility]], traps Blue Team in a [[Cryptum]], despite Chief's attempts to reason with her. Osiris, learning this, fight through the rest of Cortana's forces, and manage to free Blue Team. However, Cortana finds Earth, and uses the Guardians to [[Electromagnetic pulse|EMP]] the planet, with the ''Infinity'' narrowly escaping, while Chief reunites with the Arbiter on Sanghelios.
{{Clear}}

===''Halo Wars 2''===
{{Quote|Atriox and his Banished raided Covenant resources, cutting a swath across the galaxy; growing in strength with each attack. Gathering killers and mercenaries to his side. The Covenant had two targets in those years. Humanity and Atriox. They almost got us. But Atriox? They never came close.|[[Isabel]] explaining the Banished to Captain James Cutter.{{Ref/Level|HW2|HW2:A New Enemy|A New Enemy}}}}
[[File:HW2 - Atriox and Red Team.jpg|thumb|250px|Campaign promotional art for ''Halo Wars 2'']]
{{Main|Halo Wars 2}}

In Halo Wars 2, player controls [[Captain (NAVCOM)|Captain]] [[James Cutter]]. Co-op allows up to two players in Xbox Live link. Player two also controls Captain Cutter as the leader of an original campaign. The original campaign consists of 12 Missions with Captain Cutter as the leader while Extra campaign contains in total 7 missions, two missions from [[Halo Wars 2: Operation: SPEARBREAKER|Operation: SPEARBREAKER]] with [[Major (UNICOM)|Major]] [[Elijah Vaughan|Vaughan]] as Leader and five missions from [[Halo Wars 2: Awakening the Nightmare|Awakening the Nightmare]] with [[Voridus]] and [[Pavium]] as Leader and can be played on four difficulties. The player can find [[Phoenix Logs]] by traveling around the map on missions and unlocking [[HW2:Skulls|skulls]] by completing specific optional or bonus objectives.

The campaign is set in [[2559#March|March]] to [[2559#April|April 2559]], as Serina awakens the entire crew of {{UNSCShip|Spirit of Fire}} before making a final dispensation. Much to Captain Cutter and Professor Anders surprise, the ship was drawn into [[Installation 00]] through slipspace travel which their own slipspace drive was used as a makeshift bomb on [[Trove]]. Red Team is dispatched to scout the Ark after receiving the UNSC distress signal, only to encounter [[Atriox]], leader of the [[Banished]], after retrieving the AI [[Isabel]], with [[Douglas-042]] suffering a heavy wound. The ''Spirit of Fire'' begin their campaign against the Banished, fighting Atroix's lieutenant [[Decimus]], rescuing survivors, and impending Banished operations on the Ark alongside preventing the Banished from utilising the Ark's [[Teleportation grid|portal network]], killing Decimus, though this causes the Banished's flagship, the [[Enduring Conviction]], to attack the ''Spirit of Fire''. Through investigation on the Ark, Anders discovers a foundry that will allow her to deploy a new Halo ring in order to raise a distress beacon where the closest [[Installation 04|original site]] is [[Reach]] but Cutter cannot approve that plan until the  ''Enduring Conviction'' is destroyed. [[Jerome-092]] and Isabel are dispatched and managed to destroy the ship while Anders activate the ring for final preparations. UNSC and Banished contest their ground on [[Installation 09|new Installation]] where the UNSC is able to besiege Banished, allowing Anders to wipe them out using gravity anchors. Anders, however, is taken along with Installation 09 away from the Ark while UNSC and Banished continue to fight. She eventually exists [[Slipstream Space|slipspace]], only to be intercepted by a [[Guardian]].

====Operation: SPEARBREAKER====
Operation: SPEARBREAKER is set in [[2559#May|May]]. UNSC drones spot signs of Banished activity hidden by a [[Cloaking|cloak]] field, prompting Sunray 1-1 to investigate. UNSC forces fight [[Aggressor Sentinel]]s, and a [[Controller Sentinel]], before finding a hologram of a [[Jiralhanae Warlord]], learning that his [[Huragok]] have established cloaking towers around their work site. The UNSC set up a [[Firebase]] and launch an attack. They eventually destroy the Controller Sentinels besieging the Banished in time to see a [[Retriever Sentinel]] emerge, which is eventually destroyed. Sunray then takes the [[charging column]]s of a [[Despair-class fighter]], that could have been used to attack the ''Spirit of Fire'' offline using [[Mark II (J) Colossus]] mechs.

====Awakening the Nightmare====
Awakening the Nightmare is set in [[2559#June|June]]. Atriox, cut off from receiving supplies and aid, tasks two of his lieutenants, Voridus and Pavium, with scouting the ruins of High Charity to scavenge usable supplies, but orders them not to enter the ruins. However, Voridus, believing the stories of the Flood to be Covenant lies, leads his troops to deactivate the Sentinel defenses, causing the Flood to escape ''[[High Charity]]''. In response, Pavium prepares several waves of defenses, but all of them fail, causing him to fall back to his main [[Banished outpost|outpost]], while Voridus retreats to a nondescript Forerunner structure. Pavium then plans to use fissures in the landscape honeycombed with explosive power to halt the Flood. The plan is successful, and Voridus is able to reactivate the Ark's defenses, in time to hear that Atriox has dispatched reinforcements to assist in cleanup measures. Pavium and Voridus begin a centralised assault, but encounter a gargantuan [[Proto-Gravemind]]. Thanks to a combination of artillery, orbital support and ground troops, the Proto-Gravemind is eventually killed. Atriox arrives, scolds them for their recklessness, before ordering them to secure the breach.
{{Clear}}

===''Halo: Fireteam Raven''===
{{Quote|You heard [[Wellsley|it]], Fireteam Raven! Gear up!|Major [[Antonio Silva]] to [[Fireteam Raven]] during the [[Battle of Installation 04]].{{Ref/Level|HFR|HFR:Escape|Escape}}}}
[[File:HFR FireteamRaven Keyart 2.jpg|thumb|left|250px|Promotional art for ''Halo: Fireteam Raven''.]]
{{Main|Halo: Fireteam Raven}}

In Halo: Fireteam Raven, the player takes control of various members of [[Fireteam Raven]], in a story concurrent to Halo: Combat Evolved. It is Halo's first arcade [[Wikipedia:Light gun shooter|light gun shooter]], supporting between one and four players, with the ability to link their [[Xbox LIVE]] account and allow [[Halo Waypoint]] to track their in-game progress. The game has six missions, and is either played sat down with [[M247H machine gun]] recreations, or stood up with [[MA5B assault rifle]] recreations.

The campaign is set in [[2552#September|September 2552]], with the {{UNSCShip|Pillar of Autumn}} arriving in at [[Installation 04]]. Fireteam Raven are briefed by [[Major (UNICOM)|Major]] [[Antonio Silva]] to defend the ship from the Covenant. The team fight the Covenant [[Naval boarding|boarders]], before being commandeered by the ship's [[Dumb AI|"dumb"]] [[Artificial Intelligence|AI]] [[Wellsley]] to fend off [[Morsam-pattern Seraph|Seraph]]s attacking the ship. The team then re-enter and link back up at their [[drop pods]], before landing on the ring and heading towards the ''Pillar of Autumn''{{'}}s crash site, assisting a raid conducted by allied UNSC forces, helping the [[UNSC Marine Corps|Marines]] secure the ship. Fireteam Raven are then taken to [[Alpha Base (Installation 04)|Alpha Base]], before it is attacked by the Covenant, with the team helping to fend off the Covenant forces. Eventually, Fireteam Raven are recalled for extraction, as a [[Flood|new threat]] has emerged in the canyons near the [[Control Room (Installation 04)|Control Room]]. The team are deployed into the canyon to distract the Flood and Covenant troops to allow the Master Chief to destroy the ring. They eventually extract via [[UH-144 Falcon|Falcon]], but are shot down. Fireteam Raven survive the crash, and continue battling Flood and Covenant, being extracted by a [[D77 Pelican|Pelican]] dropship. They then join another UNSC attack on ''Pillar of Autumn''{{'}}s crash site to halt the Covenant and Flood forces attempting to stop the Master Chief destroying the Installation. Raven are deployed, but are soon stopped by a [[Deutoros-pattern Scarab|Scarab]], before boarding the Scarab from a Falcon, and taking it down. They proceed to fight until the ''Pillar of Autumn''{{'}}s fusion drives are detonated and ring explodes, killing them in the explosion.
{{Clear}}

===''Halo Infinite''===
{{Quote|Look around, Cortana. Your empire. Over! Your great plan? Ended at the hands of those who made you.|Atriox berates a captured Cortana during the [[Battle for Zeta Halo]].{{Ref/Quest|HINF|Endless (Halo Infinite)|Silent Auditorium}}}}
[[File:HINF Sacrifice.png|thumb|250px|Campaign promotional art for ''Halo Infinite'': the sixth mainline Halo game.]]
{{Main|Halo Infinite}}

In [[Halo Infinite]], the player character is once again the [[John-117|Master Chief]]. The campaign is different from previous entries in the series, as it takes on an open-world style. There are 16 main missions in Halo Infinite. However, 10 of them take place outside the open world. There are also many side missions the player can undertake, including capturing [[Forward Operating Base]]s, rescuing [[Marine]] squads, and assaulting [[Banished]] outposts. In co-op, other players are also the Master Chief. Players cannot get a certain distance away from each other, as they will die. [[Split-screen]] is not supported.

The campaign is set in [[2560#May|May 2560]]. The [[UNSC Infinity]] has been destroyed by [[Atriox]]'s Banished forces above [[Installation 07|Zeta Halo]]. The Master Chief battles Atriox onboard the Infinity, but is defeated and cast into space above the ring. He floats in space for 6 months before being found by [[Fernando Esparza|The Pilot]]. The Master Chief's suit is reactivated and he boards the warship [[Gbraakon]] and destroys it. He makes his way down to the ring to retrieve [[Joyeuse]], whose purpose is to imitate and lock down [[Cortana]]. The Master Chief and the Weapon defeat various Banished forces, before learning of a species called [[Xalanyn|The Endless]] after meeting The [[Harbinger]]. The Harbinger tells him she wants to start the [[Reformation]] so she can find and free her people, who were imprisoned because they can survive the activation of the [[Halo Array]]. The Master Chief eventually makes his way to the [[Command Spire (location)|Command Spire]] and ends the Reformation. The Master Chief goes to the [[House of Reckoning]] and defeats [[Escharum]], who was the current leader of the Banished on the ring, alongside learning of Cortana's [[Razing of Oth Sonin|actions]] on the ring{{Ref/Quest|Id=Repository|HINF|Reckoning (Halo Infinite)|Repository (Halo Infinite level)}}. Master Chief frees the Pilot, who had been captured while Chief made his way through the Command Spire. The Master Chief then goes to the [[Silent Auditorium]] to stop The Harbinger, and learns of Cortana's sacrifice to kill Atriox after the apparent death of the Master Chief. After a fierce battle, the Master Chief defeats The Harbinger. She tells an unknown entity that they have what they need to finish her work. The Master Chief then reunited with Cortana, who tells the Master Chief to learn from her mistakes. The auditorium then collapses and the Master Chief is teleported to a mysterious desert area, and continues to fight against the Banished. However, Atriox, having survived Cortana's sacrifice, uses a Forerunner key to uncover to the imprisoned Endless, while a conversation between [[Despondent Pyre]] and the Forerunner [[Grand Edict]] about the imprisonment of the Endless. with the Grand Edict revealing that [[Offensive Bias]] has been deployed to assist Despondent Pyre oversee them.

====Firefight: Battle of the Academy====
[[Firefight: Battle of the Academy]] is a mode in ''Halo Infinite'' that continues the story featured in the multiplayer cinematics. Unlike other multiplayer experiences, Battle of the Academy is described as a Linear [[Firefight]] and features two story-based missions in the maps "The Cole Protocol" and "Out With a Bang."

The Cole Protocol features the player character, [[Rook]], fighting off [[Banished]] forces who have invaded the [[Avery J. Johnson Academy of Military Science]] during the [[Battle of Nysa]] after they were led there by [[Iratus]]. The Spartans fight the Banished and make their way through the Academy, arriving in [[the Artifice]] datacenter. They enact the [[Cole Protocol]] and destroy vital data to prevent the Banished from obtaining it. Out With a Bang features Rook navigating through the place, defending the Academy and fighting Banished enemies. The Spartans eventually arrive at landing pads and escape in a [[D77 Pelican]].{{Ref/Game|Id=FF|HINF|Firefight: Battle of the Academy}}
{{Clear}}

==Trivia==
*All games except ''Halo: CE'' also have a unique, unofficial difficulty known to fans: [[Mythic]], which is Legendary with all [[Skull]]s activated. In ''Halo: Reach'', weekly [[challenges]] even feature completing levels on this difficulty. This is also known as LASO (Legendary, all skulls on).
*In ''Halo: Combat Evolved'', ''Halo 3'', ''Halo Wars'', ''Halo 4'' and ''Halo: Spartan Assault'', the endings of the five games end with a huge Forerunner structure getting destroyed or very damaged.
**''Halo: Combat Evolved'' ends with Halo [[Installation 04]] being destroyed.
**''Halo 3'' ends with Halo [[Installation 08]] firing (and getting destroyed by the effects)
**''Halo Wars'' ends with [[Trove|a Shield World]] imploding
**''Halo 4'' (and ''Spartan Ops'') ends with the [[Didact]]'s ship, ''[[Mantle's Approach]]'', the [[Composer]] and [[Requiem]] destroyed
**''Halo: Spartan Assault'' ends with [[X50]] sabotaged.
*Every ''Halo'' game released from [[2001]]-[[2009]], as well as ''Halo 4'', starts and ends with the player in space. 
**In ''Halo: Combat Evolved'', the game starts with Master Chief on the [[UNSC Pillar of Autumn|Pillar of Autumn]] and ends with him in a [[GA-TL1 Longsword|Longsword]]. 
**''Halo 2'' starts with him on [[Cairo Station (station)|Cairo Station]] and ends with him on the Forerunner Dreadnought. 
**''Halo 3'' starts off with him crashing towards [[Earth]] and ends with him stranded inside the {{UNSCShip|Forward Unto Dawn}}. 
**''Halo Wars'' starts with Captain Cutter on the {{UNSCShip|Spirit of Fire}} talking about the war on [[Harvest]] and ends with the freezing of [[Ellen Anders|Professor Anders]]. 
**''Halo 3: ODST'' starts with the [[Rookie]] on the {{UNSCShip|Say My Name}} and ends with him on an ONI orbital facility. 
**''Halo 4'' starts with the Master Chief inside the ''Forward Unto Dawn'' and ends inside the {{UNSCShip|Infinity}}. 
**''Halo Wars 2'', ''Halo: Fireteam Raven'', and ''Halo Infinite'' all start in space, but do not end there.
*AI cannot perform [[Needle Combine Kill Medal|needle supercombines]], except in ''Halo: Combat Evolved'', ''Halo 4'' and ''Halo 5: Guardians''

==Gallery==
===Development images===
<gallery>
File:H2-Concept-Earth-MOUT.jpg|Campaign concept art for ''Halo 2''.
File:H3ODST Romeo Art.jpg|Campaign concept art for ''Halo 3: ODST''.
File:HR_NobleTeam_Concept_1.jpg|Campaign concept art for ''Halo: Reach''.
|Storyboard for a campaign scenario in a 343 Industries-era game.
File:Fr EricWill UnusedStoryboards3.webp|Storyboards for a purportedly unused campaign scenario in a 343 Industries-era game.
File:Fr EricWill UnusedStoryboards1.webp|Storyboards for an unused campaign scenario in a 343 Industries-era game.
File:Fr EricWill UnusedStoryboards2.webp|One of the previous storyboard panels with shading added.
File:HI_DH_Chief_ControlRoom_Concept.jpg|Campaign concept art for ''Halo Infinite''.
</gallery>

===Promotional images===
<gallery>
File:HCE-MasterChief-Wallpaper.jpg|Campaign promotional art for ''Halo: Combat Evolved''.
File:H3 e32006 Custom ChiefCliff.jpg|Campaign promotional image for ''Halo 3''.
File:Mark ivPoster.jpg|Campaign promotional art for ''Halo Wars''.
File:HCEA 1920x1080.jpg|Campaign promotional image for ''Halo: Combat Evolved Anniversary''.
File:4 john.JPG|Campaign promotional art for ''Halo 4''.
File:Halo MCC.png|Campaign promotional image for ''Halo: The Master Chief Collection''.
File:MCC Poster 01.jpg|Campaign promotional image for ''Halo 2: Anniversary''.
File:H5G Poster.jpg|Campaign promotional art for ''Halo 5: Guardians''.
File:Ellen Anders Gabz.png|Campaign promotional art for ''Halo Wars 2''.
File:HFR LastStand Fighting.png|Promotional image for ''Halo: Fireteam Raven''.
</gallery>

==Sources==
{{Ref/Sources}}

{{Levels}}

[[Category:Campaign| ]]
[[Category:Game modes]]