Command armies of familiar and new UNSC units in its initial encounters against the Covenant, an alien coalition threatening to obliterate mankind.
Storyline - Players join the crew onboard the Spirit of Fire, a Phoenix-class colony ship converted for UNSC military use and guided by the AI persona Serina. The Halo Wars story line follows the Spirit of Fire's discovery of an ancient artifact during a journey to the planet Harvest, the first planet to be attacked by the Covenant.
Characters - With the guidance of Serina, a spirited artificial intelligence (AI) persona, gamers will direct legions of UNSC soldiers, Warthogs, Scorpions and more, each group having its own strengths and uses in battle. Adventurous commanders can also call upon ancient Forerunner technology, if they are fortunate enough to find it hidden throughout the battlefield.
Combat - Halo Wars puts gamers in command of the battlefield over an arsenal of UNSC units and vehicles as they engage Covenant forces. They can counter and crush their opponent by tactically fielding the superior army. Players can also choose among Leaders that possess elite skills which can turn the tides of battle. Using various combinations of Leaders and units, players can create countless strategies tailored to their preferred playing styles and personalized strategies.
Xbox Live - See who the superior commander is through multiplayer online skirmishes supporting up to 6 players with the New Xbox Experience. Players can choose to command either unique civilization, UNSC or Covenant, each with unique attributes and strategic characteristics. Ancient Forerunner technology can also be found to create unique units to gain an upper hand in battle.