DarkZero writes: "It also takes less than an hour to reach the final Smog Island, which is shaped like a giant skull and crossbones (the only thing missing is a heavy-handed environmental message at the end). Once that mission is finished, there's no other reason to replay this game; there's no co-op mode of any kind, nor are there Achievements (you're given awards during the mission, but they aren't viewable at all, and seem to offer absolutely no purpose whatsoever). Either one of these additions would help increase the longevity of this title.
Spend your MS points elsewhere. Or better yet, go check out some Captain Planet reruns. Either choice is a better investment".