Halo Wars has four modes: single-player Campaign, two-player cooperative Campaign, Skirmish, and multiplayer.ĭownloadable content and support was being provided by Robot Entertainment, a studio founded by many ex-Ensemble Studios employees after its closing. The game was developed by Ensemble Studios and was originally an Xbox 360 exclusive. It begins in the year 2531, 21 years prior to Halo: Combat Evolved, during the Covenant eradication of the Outer Colonies in the Human-Covenant war. Halo Wars is a real-time strategy game in the Halo Universe.