You should try Insurgency.
It's modern warfare. One hit kills...
If you think it's CS...and run ahead to pwn everyone...you'll die in a second hehe. It can get pretty crazy.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )