Portal it's called...
And Portal < TF2 < HL2: ep 2
And that's saying a lot, because Portal looks amazing, TF2 is going to be intense...and HL2 is of course among the best games ever.
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 )