PS2 King Kong: The Official Game Of The Movie Cheats

[Lawrence]

Alternate ending level:
Accumulate 250000 points by replaying the levels and select it from the extras menu.
Alternate ending level Get 250000 points

King Kong Cheat Menu:
At the main menu (game-option-bonus) hold L1 + R1 then press: down-circle-up-square-down-down-up-up then let go of L1 and R1. At the main menu select cheat. Type in the codes below to activate the codes.

God Mode 8wonder
All Levels KKst0ry
Bonus Complete KKmuseum
One Hit Kills GrosBras
Ammo 999 KK 999 mun
Have revolver KKtigun
Have Shotgun KKsh0tgun
Have Machine Gun KKcapone
Have Sniper Rifle KKsn1per
Infinite Spears lance 1nf

Unlock the Artwork Gallery:
In order to unlock the artwork gallery, you must beat the game.
Art Gallery Beat the game

Source