A Spelunky Classic mod with online multiplayer.
Wasteland Kings Together
An online multiplayer mod for Wasteland Kings
A one Man MMO
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!