Editing 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|Halo: Combat Evolved|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 [[Covenant Religion|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|Halo 2|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 [[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 co