SpeedRunners

In a city filled with superheroes, getting to crimes becomes a competition on its own. Fortunately there are enough rockets, bombs, grappling hooks, spikes, and other goodies lying around -- to make the competition fun and fast. Welcome to SpeedRunners. SpeedRunners is a 4 player competitive platformer with grappling hooks, power-ups, and interactive environments. Run, jump, swing around, fire rockets, grapple onto people to knock them off screen.
KEY FEATURES:

4 Player Competitive Platforming!
Keep up with the fastest player in-game, or fall offscreen and get eliminated!
Use weapons like missiles, mines and grappling hooks to screw over your friends, and make new enemies!
Local and online multiplayer! Can you have 2 players on a couch against 2 other players on the internet? Yes of course!
Bots enabled - play on your own with several AI opponents. Or put them into matches with other people!
A tutorial teaches you how to play
Controller compatible (and recommended!)
A dozen expertly designed maps
Unique game modifiers
A character named Unic!
Full blown level editor with over 10k user created levels
An exciting single player campaign
Create your own custom in-game trails (visible when you hit super-speed)
Minimum:

OS: Windows XP and up
Processor: 1Ghz and up
Memory: 3 GB RAM
Graphics: Dedicated video card recommended
Network: Broadband Internet connection
Storage: 800 MB available space
Additional Notes: MAC Users: SpeedRunners runs great in Parallels Desktop