Monday Night Combat is a game that came out several months ago on the 360. The developers have evidently grown tired of fighting Microsoft every time they wanna patch the game so they are bringing it to PC. It is available now on steam (and by available I mean you will get beta access) for 13.49.
MNC plays like DotA/Demigod/LoL but in a shooter format. You have six classes that you can upgrade as the game progresses via gold you get by killing other players and bots. Bots spawn from your portals and are your creeps in this game, and you need them to breach the shields to the Money Ball, which is what you're trying to destroy. It is a very fresh and interesting game, And I suggest you follow the link and At least take a look. Bear in mind, it is in beta, and while the game itself mostly works, the server browser and connection stuff is pretty bad atm, though they are working on a fix. Cheers.