Portal 2 has hit retail shelves with smashing amounts of success in the eyes of critics but it appears as though it still may take it a while to catch the sales mark set by its predecessor. Valve recently revealed that the classic puzzle game (that was once an indie title) is coming up on the 4 million unit mark. Obviously the success of The Orange Box has likely propelled that number higher than it would’ve been as a stand alone game, but it’s still very impressive, especially when you consider that this figure does not include any units sold on Valve’s PC gaming network, Steam.
Anyone want to start taking bets on how long it will take Portal 2 to catch up? If our review is any indication, probably not long.