Cheat mode
Go to main screen, press [Triangle], and press [Right] until the "Extras" option is selectable. Press [X]x3 to access the code input and enter one of the following passwords. Note: Some codes require that you find the comic that unlock that particular cheat before it can be enabled:
BRINGIT - Double health power-up values
DESTROY - Double damage from Hulk
RETRO - Black and white graphics
HISTORY - Sepia tone graphics
OCANADA - Canadian flag shorts
DEUTSH - German flag shorts
MUTANDA - Italian flag shorts
FURAGGU - Japanese flag shorts
BANDERA - Spanish flag shorts
FSHNCHP - U.K. flag shorts
AMERICA - U.S. flag shorts
SUITFIT - Joe Fixit (Gray Hulk) skin
VILLAIN - The Abomination skin
PILLOWS - Low gravity
CABBIES - All vehicles are taxis
TRANSIT - All vehicles are buses
FROGGIE - Aggressive traffic (doubles the speed of traffic and removes the veer functionality)
KINGKNG - Big blue gorilla balloons
CHZGUN - Cow missiles
SMASH5 - 5,000 Smash Points
SMASH10 - 10,000 Smash Points
SMASH15 - 15,000 Smash Points