Robot Roller-Derby Disco Dodgeball is a multiplayer arena combat FPS where you race around a dance club / skate park and hit each other in the face with exploding Dodgeballs.
You can purchase an Early Access copy of the game here. You get: a discounted copy of the game, DRM-free, all future updates and the official release included, as well as a Steam key if / when the game is released there.
Disco Dodgeball is now on Steam Greenlight as well!
You can also check out the free webplayer version. Note this does not include all the arenas and game modes that the full version has.
Game Modes include:
Team Deathmatch - Classic mode where you race to rack up the kills
Elimination - No respawns, last team with players standing winds
Score Battle - Compete to land the most trick shot kills
Hoops - Throw dodgeballs through opponent's goal ring to score points. Like basketball, if each player had their own ball and you could throw them at each other