Find a terminal during game play, then enter "FIFTEEN" as a code.

Select the "Code Input" selection at the options screen, then enter "BRNGITN" as a code to unlock this option at the cheats menu.

Select the "Code Input" selection at the options screen, then enter "HLTHDSE" as a code to unlock this option at the cheats menu.

Select the "Code Input" selection at the options screen, then enter "ANGMNGT" as a code to unlock this option at the cheats menu. The Rage meter always remains full.

Select the "Code Input" selection at the options screen, then enter "MMMYHLP" as a code to unlock this option at the cheats menu.

Find a terminal during game play, then enter "NANOMED" as a code.

Find a terminal during game play, then enter "SANFRAN" as a code.

Find a terminal during game play, then enter "PITBULL" as a code.

Select the "Code Input" selection at the options screen, then enter "GMMSKIN" as a code to unlock this option at the cheats menu. The Hulk and Bruce Banner will be invincible.

Find a terminal during game play, then enter "JANITOR" as a code.
Select the "Code Input" selection at the options screen, then enter "BRCESTN" as a code to unlock this option at the cheats menu. Puzzles will immediately be solved.

Select the "Code Input" selection at the options screen, then enter "FLSHWND" as a code to unlock this option at the cheats menu. The Hulk will regenerate faster.

Select the "Code Input" selection at the options screen, then enter "NMBTHIH" as a code to unlock this option at the cheats menu.

Select the "Code Input" selection at the options screen, then enter "GRNCHTR" as a code to unlock this option at the cheats menu.

Select the "Code Input" selection at the options screen, then enter "TRUBLVR" as a code to unlock this option at the cheats menu.

Note: This will also unlock all of the challenge modes.

Select the "Code Input" selection at the options screen, then enter "FSTOFRY" as a code to unlock this option at the cheats menu. The Hulk will have one hit kills.