The listing, Limbo [steam key] region free has ended.
“Limbo is as close to perfect at what it does as a game can get.”
10/10 – Destructoid
“The game is a masterpiece.”
5/5 – GiantBomb
“Limbo is genius. Freaky, weird genius. Disturbing, uncomfortable genius.”
5/5 – The Escapist
“Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.”
5/5 – Joystiq
More info: http://store.steampowered.com/app/48000/