3 Games that can show what the Xbox 360 can do

[tripleb2k]

People often complain this site has become a PS3 playground and Xbox 360 isn't represented enough. So let's be fair, there was a good thread about PS3 games, now is 360's turn

My picks:
Gears of War (great graphics)
Left 4 Dead (great xbox live experience)
Shadow Complex (great arcade game)