If you are a gamer who even slightly enjoys first person shooters and you don't own
Call of Duty 4: Modern Warfare, you are totally missing out.
It's unbelievable.
I'm as big a Halo fan as the next guy, but this game totally destroys Halo in gameplay and in presentation. The one thing it lacks is cool space scenes (well, and Master Chief). The one thing Halo lacks is getting to be the gunner on an AC-130 (ok, and sneaking around deserted Chernobyl in a ghillie suit).
Even if you don't care for first person shooters, the graphics alone make this one worth checking out. I sometimes forget it's a game, not a high def movie.
Check out one of the trailers here:
Yes, that's gameplay you're looking at.