Shadowgrounds is a top-down shooter from Frozenbyte, the Finnish team later known for Trine. Aliens attack a human colony on Ganymede, a moon of Jupiter, and you fight through dark corridors and facilities armed with a growing set of weapons. Each gun can be upgraded with parts gathered during the campaign, and the lighting and explosions set a tense mood.
The campaign can be played alone or in local co-op on a single computer, sharing the keyboard or using gamepads. It suits fans of classic twin-stick and top-down shooters, and friends looking for some old-school alien blasting together.