Come one come all! Get your free piece of cake. Only for a short time valve is giving "FOR FREE" all nvidia users a copy of the game Portal, from the Orange Box. I personally have this game and have played all the way through it. Its a great game and anyone who has nvidia should NOT pass up this opportunity!
heres a link: http://kotaku.com/342837/geforce-gamers-get-free-cake-from-valve-no-lie