Cheats:

 Activate the cheat mode with

 1) At the elect Difficulty Level screen hold down the [Tab] key and
    press the [Ctrl] key.
 2) At the Select Player screen type: robisagod
    You should hear a sound effect. Cheat mode is now active!

 Type any of these codes during the game:

 BEAGLE    - Invincibility
 GIVEBLOOD - Blood Code
 RESCUE    - Rescue All Hostages
 GETMEOUT  - Warp To The Next level
 INFRARED  - Display Hidden Areas
 KICKASS   - Turn On All Weapons
 GEEWHIZ   - Cut To The End Game Scene

 Type the word SQUIGGLY at the character selection screen (you'll hear
 a noise) then press [Up] to access Special Agent Squiggly!