Halo: Combat Evolved Anniversary is an upgraded version of Halo: Combat Evolved released in 2011. It is the follow up to Halo: Combat Evolved and the Anniversary edition of Halo: Combat Evolved. For more information on the game, see our Halo Guide.
Halo: Combat Evolved Anniversary retains much of the content and gameplay of its predecessors, delivering new technologies and features never seen before in a Halo game. Halo: Combat Evolved Anniversary features a new multiplayer mode called "Arena", which can be played alone or head to head with an artificially intelligent computer. In this multiplayer mode, players choose a character and start the game at ground level, with all other players joining you after you've activated the console command" Arena". There are two sides to this Arena battle, the Covenant and the allies.
The story line in Halo: Combat Evolved Anniversary takes place several years after the events of the original game, The Pillar of Autumn. The planet Reach was bombarded by the Covenant, and only the most powerful members of the United Nations Space Command were able to escape the planet before the Covenant arrived. This tale is told through the story journal of the protagonist, the player, and unfolds throughout the course of the game.