The game spans the first.. three seasons, I think? So unless you've seen those seasons, I wouldn't play it or you'd get spoiled.. that being said, I finished the game in one sitting one afternoon. Took about 6 hours, maybe, got all of the achievement points in the 360 version. It's not considered official, either-- they changed around some stuff. It is neat to see some unseen areas from the show, even if it isn't considered part of the show's canon.