From the developer's webpage (yes it's short, but after you read it, you won't need to read anything else!):
Disco Dodgeball is a team-based multiplayer FPS where you race around a skate park / dance club in jet-powered robots and try to hit each other with exploding dodgeballs.
Good luck, and don't forget to enter all of the other Christmas giveaways as well!
Note: Five winners will be chosen at random. The giveaway is open worldwide. The winners will be emailed via their Rafflecopter email address once chosen, and will have three (3) days to reply to it. If you don't reply within the three days, a new winner will be chosen at random.
a Rafflecopter giveaway