At the "Press Start" screen, quickly press Up, Down(2), Right(3), Left(4), then hold C-Down and press Start to unlock trial mode. If you entered the code correctly, you will hear the sound of a gunshot. This mode allows any level in the game to be played. Note: The code must be entered before demonstration mode begins.
At the "Press Start" screen, quickly press C-Left, C-Right, C-Left, C-Right, C-Up, C-Down, C-Up, C-Down, then hold L and press Start to unlock sudden death mode. If you entered the code correctly, you will hear the sound of a gunshot. This mode allows opponents and your character to be killed with one hit. Note: The code must be entered before demonstration mode begins.
At the "Press Start" screen, quickly press L, C-Right, C-Left, C-Right, C-Left, C-Down, C-Up, C-Down, C-Up, then hold L and press Start to unlock max power mode. If you entered the code correctly, you will hear the sound of a gunshot. This mode allows you to start with all weapons and infinite ammunition. Note: The code must be entered before demonstration mode begins.
At the "Press Start" screen, quickly press Up, Down(2), Right(3), Left(4), then hold C-Up and press Start to unlock all the Bosses as well as the engineer and a few army characters in multi-player mode. If you entered the code correctly, you will hear the sound of a gunshot. Most of the Bosses have odd guns and may not be able to back up against walls or roll. Alternatively, successfully complete the game on the easy and normal difficulty settings. Note: The code must be entered before demonstration mode begins.
When out of pistol ammunition in story mode, press B to reload.
Successfully complete the game on the hard difficulty setting to unlock max power, sudden death and trial modes.
Wait for demonstration mode to begin at the "Press Start" screen. Eventually, another sequence will appear after memo mode cycles a few times.
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Game Shark Codes
Unlock All Multi-Player Characters
8115D412 FFFF
8115D410 0003
Enable Max Power Mode
8015D417 0001
Infinite Health P1
8017AABB 0064
Infinite Hangun Ammo P1
8017AAB7 0009
Infinite Shotgun Clips P1
801587C1 0060
Infinite Shotgun Ammo P1
8017AAB3 0008
Infinite Submachine Gun Clips P1
801587C0 000C
Infinite Submachine Gun Ammo P1
8017AA9F 001E
Infinite Submachine Gun Ammo P2
8017C41F 001E
Have Max Clips For Shotgun & Submachine Gun P1
801587CD 000C
Have Handgun with Silencer & Infinite Ammo P1
801587C4 0009
Have Rocket Launcher with Infinite Ammo P1
801587CB 0004
Shotgun Enabled P1
801587C7 0001
Shotgun Disabled P1
801587C7 0000
Submachine Gun Enabled P1
801587C6 0001
Submachine Gun Disabled P1
801587C6 0000
Have C4 Explosives (Slot 1) P1
801587C3 0001
Have Flashlight (Slot 2) P1
801587C5 0001
Have C4 Detector (Slot 3) P1
801587C8 0001
Have Key (Slot 3) P1
801587C9 0001
Have Card Key (Slot 3) P1
801587CA 0001
Always Have Flashlight On P1
80179448 0001
