You need to remember......
Bioshock *does* have the advantage of being the highest-rated game of the year, and probably will finish #1 on the X360 rankings, and possibly at the end of the year, even after SMG and SSBB hit.
That definately should count for a huge bit, despite pessimism on the fact it's SP-only. I don't remember SP-only hurting a short-er game like Dead Rising.
Back from the dead, I'm afraid.







