Alternate Outfit for Spiderman
Description: Unlock "Project Carnage", which will allow you to choose between Spiderman in a red outfit or a black outfit

How to unlock: Beat the game once through. Now, find Nick Fury at the main hub during a subsequent playthrough and approach the computer when he tells you to.

Story Mode Characters
The listed characters can be unlocked once they are encountered and defeated during Story Mode:
Black Cat, Blade, Doctor Octopus, Green Goblin, Iron Fist, Rhino, Sandman, Venom.