Set in the near future, Universe at War: Earth Assault sees multiple enemy factions from across the galaxy come to Earth to wage war on an intergalactic scale. The game's setting is set amidst a backdrop of conflict and destruction as various alien forces clash with humanity.
The gameplay revolves around commanding different alien factions, each with its unique playstyle. From the Hierarchy's lumbering walkers to Novus' rapid hit-and-run tactics, mastering one faction does not guarantee success when switching to another. The game's Tactical Dynamics feature allows players to customize their chosen faction on the fly by upgrading units, using heroes, and managing a branching research tree.
Players can engage in battle with AI opponents in campaign, scenario, and skirmish modes, as well as online through Live, playing in ranked, custom, or Conquer the World game types.
Universe at War: Earth Assault was released on the Xbox 360 console on March 7th, 2008.