You have to defeat the Berserkers, automated war machines programmed to kill all life they encounter.
Gameplay Video
StarDrive 2
Age of Wonders: Planetfall
Gears Pop!
Mobile Suit Gundam: A Year of War
Mobile Suit Gundam Gihren's Greed: The fear of Axis
Order of Battle: World War II
Left Alive
Interstellar Space: Genesis
X-COM: em@il Games
Mobile Suit Gundam: Shin Gihren No Yabou