Campaign

Campaign Mode is the single player gaming aspect of Halo: Combat Evolved, Halo 2, Halo 3, Halo 3: ODST and Halo:Reach, where the player takes control of a single character at a time through the canonical storyline of the Halo trilogy, and the single player aspect of Halo Wars, where the player takes control of an entire UNSC Army force.

Description
In Halo: Combat Evolved and Halo 3 the player plays as John-117 or Master Chief, in Halo 2 the player plays as both Master Chief and the Arbiter Thel 'Vadam a Covenant Elite, which allows the player a more personal view on Covenant society.

In Halo Wars, the campaign has a different gaming aspect. The game is a strategy video game, and the player takes control of a whole base, troops and vehicles. It is up to him to decide where a squad will go, when a building will be constructed e.g. Again, the game follows the canonical storyline of the Halo Universe.

It can be played on four difficulty levels, listed in order from most difficult to the easiest: Legendary, Heroic, Normal, and Easy. In addition, Halo: CE and Halo 2 have a co-op Campaign option permitting two players to play through campaign either in split-screen or via system link between two Xbox Gaming Consoles. For Halo 3 the number of players permitted has changed to allow up to four players and the use of Xbox Live.

Halo 3 also has a unique, unofficial difficulty known to fans. One of them is Mythic, Legendary with all Skulls activated.

Halo: Combat Evolved Campaign Levels

 * 1) Pillar of Autumn
 * 2) Halo
 * 3) Truth and Reconciliation
 * 4) The Silent Cartographer
 * 5) Assault on the Control Room
 * 6) 343 Guilty Spark
 * 7) The Library
 * 8) Two Betrayals
 * 9) Keyes
 * 10) The Maw

Halo 2 Campaign Levels

 * 1) The Heretic (Cutscene Only) (Non-playable) (Solo)
 * 2) The Armory (Tutorial) (Solo)
 * 3) Cairo Station
 * 4) Outskirts
 * 5) Metropolis
 * 6) The Arbiter
 * 7) The Oracle
 * 8) Delta Halo
 * 9) Regret
 * 10) Sacred Icon
 * 11) Quarantine Zone
 * 12) Gravemind
 * 13) Uprising
 * 14) High Charity
 * 15) The Great Journey

Halo 3 Campaign Levels
A walkthrough for some of these levels (and a few others) can be found here.


 * 1) Arrival (Cutscene Only) (Non-playable) Tutorial (Only in Easy and Normal)
 * 2) Sierra 117
 * 3) Crow's Nest
 * 4) Tsavo Highway
 * 5) The Storm
 * 6) Floodgate
 * 7)  The Ark
 * 8) The Covenant
 * 9) Cortana
 * 10) Halo

Halo Wars Campaign Levels

 * 1) Alpha Base
 * 2) Relic Approach
 * 3) Relic Interior
 * 4) Arcadia City
 * 5) Arcadia Outskirts
 * 6) Dome of Light
 * 7)  Scarab
 * 8) Ander's Signal
 * 9) The Flood
 * 10) Shield World
 * 11) Cleansing
 * 12) Repairs
 * 13) Beachhead
 * 14)  Reactor
 * 15) Escape

Halo 3: ODST Campaign levels

 * 1) Prepare To Drop
 * 2) Mombasa Streets
 * 3) Tayari Plaza
 * 4) Uplift Reserve
 * 5) Kizingo Boulevard
 * 6) ONI Alpha Site
 * 7) NMPD HQ
 * 8) Kikowani Station
 * 9) Data Hive
 * 10) Coastal Highway

Trivia

 * Every Halo game starts and ends with the player in space. In Halo:CE, the game starts with Master Chief on the Pillar of Autumn and ends with him in a Longsword. Halo 2' starts with him on Cairo Station and ends when he is on the Forerunner Dreadnought. Halo 3 starts with him crashing towards Earth and ends with him stranded inside the Forward unto Dawn. 'Halo 3:ODST starts with The Rookie on the UNSC Say my name and ends with him on an ONI orbital facility. Halo wars starts with Captain Cutter on the Spirit of Fire talking about the war on Harvest and ends with the freezing of Professor Anders. Halo: Reach could be an exception but this is yet unknown.


 * Halo: Combat Evolved starts with Master Chief leaving a cry pod and Halo 3 ends with him entering one again.'
 * In Halo: Combat Evolved, Halo 2, and Halo 3: ODST; when the game transitions from cutscene to gameplay, it would fade to white. In Halo 3 and Halo Wars the transitions would fade to black.
 * In every game the Master Chief falls unconscious. In Halo: Combat Evolved, he is unconscious after the escape pod crashes at the beginning of the level Halo. In Halo 2, he is knocked out when the Pelican crashes on Outskirts. In Halo 3, he is unconscious at the beginning of Sierra 117 where he lands on the ground after leaving the Forerunner Dreadnought. Similarly, in Halo 3:ODST, the Rookie is knocked unconscious upon landing.
 * In Halo: Combat Evolved, Halo 3 and Halo Wars, the endings of the three games end with an exploding Forerunner structure: Halo: CE ends with Halo Installation 04 exploding, Halo 3 ends with Halo Installation 04B exploding, and Halo Wars ends with a Shield World exploding.
 * In Halo 2 and Halo 3: ODST, the endings of the two games end with a large battle: Halo 2 ends with a battle with the Brute Chieftain Tartarus, while Halo 3: ODST ends with a large battle with Covenant.
 * In the Halo Trilogy, as well as Halo 3: ODST, the main character performs some sort of a drop towards the beginning of the game. In Halo: CE the Master Chief crashed onto Halo in an evac pod. In Halo 2 he jumps from the Cairo station to destroy a Covenant Assault Carrier. In Halo 3 he falls from the Dreadnought in the opening cutscene, and in ODST the Rookie takes part in a combat drop into New Mombasa.