Read the article on WIRED.com
It’s fast becoming a sport of its own. In games as diverse as Fallout 3 and Mirror’s Edge, players are pushing to find or create unexpected ways to break past the game horizon, and turn the designers’ intentions on their heads.
It’s only a matter of time before someone releases a game where the best version is the one you were never intended to play.
It's not a bug, it's a feature, aye?
Wait, where did we heard that before?