Pause game play, select the "Extras" option, then enter one of the following passwords to activate the corresponding cheat function.

Effect	Password
Characters
Beetle	KXFQ87
Black Cat	P9OWL0
Captain America (Classic)	7HWU4L
Carnage	AA0Z50
Howard the Duck	J58RSS
Hydra Soldier	B7AA3K
Iron Man (Mark 17 "Heart Breaker")	2NGSRZ
Iron Man (Mark 38 "Hulkbuster")	CK7SDS
Iron Patriot	Q5X1J5
MODOK	SZ8Q06
Spider-Man (Future Foundation)	WFOZXQ
Thor 2014	H8CSE6
War Machine	TQ4C57
Wolverine (with hood "cowl")	OAW2LB
Vehicles
Avenging Cycle	5T3CQU
Pumpkin Chopper	35E41W
SHIELD Staff Car	D5B7O3
Spider Bike	SH9MZQ
World
Studs x2	UZFBG4