Nice hint, for the Mort will lend you Credit trophy you do not need to buy everything like multiplayer costumes, I only bought the Brian and Stewie upgrades whilst hoarding Money. So still complete Obsessed and Big Dipper before, then buy the grenade upgrade last. I have bought a SWAT Costume for all characters, but for Adam West that is his only buy, should save plenty of time for you. Multiverse Madness is keeping me from this platinum!
I know this may sound a bit ridiculous, but how exactly do you win a match of "catch the greased up deaf guy", I guess im retarded but I don't get how to win, I chase the guy everywhere and nothing happens, any help would be greatly appreciated, lol Update: Figured it out, didn't realize you had to melee him first, sometimes the simplest things elude me, great guide though, helped a lot! =)