http://store.steampowered.com/app/104700/
https://uberent.com <-- beta sign-up

For those that didn't play the first one, its kind of like a cross between tf2 and dota. The original is/was really fun, but had some shittiness going on balance-wise and was pretty much dead 3 months after it came out. The new one is supposed to have fixed the balance issues and made the metagame a lot deeper.

Fun break from Quake for those of us that hate sitting around right-clicking on shit in Dota/LoL/HoN.