Steam and buy it, it's only $19.00. But if you're too broke like the majority of us, you can play a flash version here. So there. No more excuses. In the game you are Chell, [her name's never really given, I'm pretty sure it's just what people call her] and you wake up as a test subject in Aperture Laboratories. You are greeted by GLaDOS, a messed-up AI who can be described as being a "friendly psychopath." It is a puzzle-type game with virtually no storyline whatsoever, but don't let that fool you. As stated earlier: "best game ever." Everything about the game is amazing, even the turrets. Yes, the things that try to kill you. I find them, and GLaDOS, quite comical. Let me give you an example of this: GLaDOS puts a scientific law, that is the law of conservation of momentum, (how momentum is conserved between portals) into layman's terms... "Speedy thing goes in, speedy thing comes out." Or much later on in the game when GLaDOS is talking about an "Aperture Science thing" and she says: "That thing is probably some kind of raw sewage container. Go ahead and rub your face all over it." and her "honesty" quote: "Have I lied to you? In this room, I mean." So I will end this now, to let you go play this game. Do it now.