Cheat mode:
Enter the options screen and highlight "Controls" Press Start, then exit the options screen, then press Start to begin game play. Level select, music select, and player select options will appear.

Debug mode:
Enter NYUKNYUK as a password and press Start immediately after the last letter is entered. The text "Second Controller Enabled" will appear to confirm correct code entry. Then, go to the options screen, highlight "Controls" and press Start. Next, start the game at the "Start" selection. Use the following actions to enable the corresponding cheat. Note: Level select is enabled by default when game play begins.

Walk through walls
Press the D-pad on controller two.

Full life and ammunition
Press B on controller two.

Slow motion
Press A on controller two.

Disable cheat mode
Press Start on controller two.

Additional options
Select Grant and the easy difficulty on the options screen. Use the controller configuration option to return to the default settings. Then hold A and press Start. Another menu with additional options will appear.

View ending sequence:
Enter FREIHEIT as a password.

All weapons:
Enter 4VTNVVTI or 4VTNVVIT as a password. All of the weapons will be available with the ammunition set to 99, except for missiles which will be set to 91.

Enter WAGNER93 as a password to have all weapons and ammunition.

Master password:
Enter JP_0_ARK as a password, where the first blank can be G (to play as Grant) or R (to play as the Raptor). Enter a number from 1 to 7 in the second blank to select the corresponding Grant level or a number from 1 to 5 to play the corresponding Raptor level.

Hint: Finishing the last level with Grant:
To complete the last level with Grant, stand between the two dinosaur bone statues and keep shooting at the raptors. This may easily be done after enabling cheat mode. Then, when you jump between the statues, shoot one of the raptors very quickly, then press Up on controller two to return to safety.

Hint: Defeating Grant as the Raptor:
Quickly jump in between the two dinosaur skeletons or Grant will throw grenades. Quickly kick at the gray bases of the skeletons and eventually they will fall down.

Hint: Defeating Raptors as Grant:
Jump in between the two dinosaur skeletons and do not disturb the Raptors. Use the explosive grenades on the gray bases of the skeletons. You might have to jump and throw the grenades to avoid hitting the Raptors.

Hint: Play as the Raptor in Grant levels:
Select the Raptor as your character, then enable the "Debug mode" code. When the level select screen appears, choose one of Grant's levels. When game play begins, you will still be Grant. Touch a enemy to change into the Raptor. Note: There are a few levels in which this trick will not work.

Hint: Play as Grant in Raptor levels:
Select Grant as your character, then enable the "Debug mode" code. When the level select screen appears, choose one of the Raptor's levels. Note: There are a few levels in which this trick will not work. Additionally, weapons may not be used at times.