Up to 4 players can battle together in local co-op (online is currently in beta) in both the Story and Arcade Modes
It's 2147 and the human colony on Europa has suffered a terrible fate. Rebooting after hibernation, two super-intelligent AI cores awake to find themselves installed within a couple of old security drones. Their attempts to uncover what occurred may end up becoming a lower priority than merely surviving...
Story mode sees you battle through a ton of handcrafted levels as you attempt to shed light on the calamity that befell the colony.
Arcade mode is a straight up arena-shooter, where you battle wave after endless wave of the alien horde.
Versus mode pits you against up to 3 friends (or AI controlled bots - If your friends are wasting their time doing something other than playing Dual Core).