A Spelunky Classic mod with online multiplayer.
Wasteland Kings Together
An online multiplayer mod for Wasteland Kings
Boss Bashing Button Brawlers
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 - Deadly 2D platformer with portals!