Cheat mode:

 Start the game with the case-sensitive -SPRUNKKNOWN command line
 parameter to enable cheat mode. Then, enter one of the following codes
 to activate the corresponding cheat function. Note: Using cheat mode
 may cause the game to crash.

 [Alt][<] or [>]        Play cockpit warnings and announcements
 [Alt][Up] or [Down]    Send Herc 12 meters in that direction
 [Alt][Left] or [Right] Face Herc in that direction
 [Alt][Ctrl][N]         Nukes enemy
 [Alt][Ctrl][S]         View Herc textures
 [Ctrl][N]              Select combat viewpoint 1
 [Alt][S]               Toggle AI
 [Alt][Keypad Plus]     Advance 1 frame forward when AI disabled