Playing with the laws of physics is fun! You can fly through the air, walk through walls, get in to all sorts of trouble... of course there's the unfortunate possibility of breaking the universe in two and getting sucked into a destructive black hole of which there is no return from.
Is it worth all that mess? Really?
When you're talking Portal 2 it is. It just so happens that Valve's impossibility machine emulator will land next month and Amazon is hoping to give you and all gamers a more fortunate outcome to all the madness.
Preordering Portal 2 for the Xbox 360 or PS3 will net buyers $20 credit towards their next games purchase at the online retailer. The PC/Mac version of the game is only $44.99 to boot. You should remember that the PS3 version includes PC and Mac activation through Steam Play. Three versions of the game and $20 to boot? A piece of cake. Visit Amazon to place your order. If only they had a button to cancel the other preorders you made.