A fast paced, object orientated, wave respawn ego-shooter
Going to be free to play once out of beta (iirc sometime next month) some 2k keys left as of writing this at http://www.mmobomb.com/giveaway/dirty-bomb-steam-codes
(they appear to have issues, try refreshing if errors come up)
I played some 30 hours now and am hooked, sadly it has the League of Legends model (buy expensive champs or grind for quite a while - grind is subject to change tho)
here is a fairly long vid of a showgame between EU and NA so you can get an idea (pug servers obviously are a bit more chaotic)
Watch this vid @ Youtube (new Window)
There will be dedicated servers, possibly windoof only, didn't find anything too specific yet (try to google anything dirty bomb :S)