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A Spelunky Classic mod with online multiplayer.

An online multiplayer mod for Wasteland Kings

Smash bosses with your friends, using only one button. Online multiplayer game for 2-4 players. 4 players recommended.

Color Ninjas is a versus game that is all about randomness, power ups, cowardice and shouting at each other!

2D multiplayer side-scrolling battle arena

Portal Mortal - Hardcore 2D platformer with portals!