The Co-Op Experience Play through the single player campaign with a friend in co-op mode or take on the AI in skirmish.

Each player has control of their own group of troops. Players share the bases, and are responsible for building their own troops from a shared pool of resources.

Each player can build structures and research technology in the bases.

All achievements and progress are shared including skulls, black boxes, and scoring.

Background: Experience the battles that started it all in this combat-strategy saga that unfolds in the storied universe of Halo. Set in the time before the original Halo first-person shooter, Halo Wars begins aboard a ship, the Spirit of Fire, retrofitted for UNSC military use. Lead legions of UNSC soldiers, Scorpions, Warthogs, and more into combat as you experience the first battles in the war against the Covenant. Choose the right leaders to carry out your battlefield strategy, move units, command troops, attack, counterattack, and crush your opponents in large-scale Halo battles. Online multiplayer battles let up to six commanders match wits using UNSC or Covenant forces.