Portal

This game is amazing to me. Valve has done such a great job finding this game when it was just a concept and working it to perfection. Yes, I said perfection. I believe this game is the perfect puzzle/action game. It is not the perfect puzzle game, because it is so short and it is not the perfect action game because there is basically no combat, but the whole is an amazing title which would have easily been worth $60 (if it had a few more levels), except Valve threw in a few more excellent games for us. Ok, I'm done confessing my love of Portal.