The world ends with you. Finished final time attack challenge on ultimate, took me 25 minutes (plus 3 days of failing rage), A rank. All secret reports, items, character stickers, 62% pin mastery... good playthrough ^^
I couldn't stop laughing when Bowser blew up the party and everyone was screaming, it looked like armageddon. All we needed was some guy shouting "OH GOD WHAT A WORLD WHAT A WORLD, WHYYYYYYYYYYYYY"
I've gone back to an old favourite, Dead Rising on 360.
With all its flaws, and dodgy AI, its still a fun game, and you can just kill all the survivors since you aren't penalized for doing so.