Cheats: 
Enter these codes during game only (find a Game Terminal to enter them):
SANFRAN - UNLOCK in MOVIE ART : "HULK TRANSFORMED"	
PITBULL - UNLOCK in MOVIE ART : "HULK VS. HULK DOGS"
FIFTEEN - UNLOCK in MOVIE ART : "DESERT BATTLE"
NANOMED - UNLOCK in HULK UNLEASHED : "HULK MOVIE F/X"
JANITOR - UNLOCK GRAY HULK (Play as the gray Hulk immediately)

Enter these codes in Options/Code Input :

GMMSKIN - INVULNERABILTY (Hulk and Banner are invulnerable to all damage)
FLSHWND - REGENERATOR (Hulk regenerates at twice the speed)
ANGMNGT - FULL RAGE METER (Rage meter is full and never depletes)	
GRNCHTR - UNLIMITED CONTINUES (Number of continues never depletes)
HLTHDSE - DOUBLE HULK'S HP (Hulk's health is doubled)
BRNGITN - DOUBLE ALL ENEMIES HP (Enemies' health are doubled)
MMMYHLP - HALF ALL ENEMIES HP (Enemies' health are halved)
FSTOFRY - WICKED PUNCH (Instant kill with any of Hulk's attack)
BRCESTN - PUZZLE SOLVED (Puzzles are immediately solved when encountered)
NMBTHIH - RESET HIGH SCORE (Reset all High scores to default)
TRUBLVR - UNLOCK ALL LEVELS

Then, you can activate them in Options/Special Features/Cheats.


At any code input screen within the game itself, type Janitor, get to the next save point, save, and when ya reload, you can play with the grey hulk.


Launch Parameters : 

Hulk.exe uses a separate file (args.txt) for the launch parameters:

You can create this file (simple text format) or directly unrar args.txt 
included in this release, into your install directory. 

Next edit it to change parameters with:

-fesoak  -  Unlock Special Features (cheats/arts/movies)
-supersoak  -  Unlock ALL (Cheats/art/movies/challenge modes)
-soak  -  Begin directly to first level

Another (useless) parameters to try for nosy guys :

-lighthack
-window
-framerateicon
-drawcode
-nosound
-nocd