Prepare to get your brain pwned.

Portal will blow your mind. Like, you will play this game, and it will actually make your grey matter ooze out of your ears in amazement, and out of your mouth as you drool at it's uber awesomeness. Playing this game is something spectacular. They even manage to make an STD joke! Your guide makes constant jokes and jests at your survival, and its presentation is simple, and straight to the point. Moreover, it's a concept that just rocks.