G-Nome

Press <CTRL+F1> in the PDA. Then type "redtop trod" - you are now able to select mission.
If you instead type "had a nude on" you can use the following during the game:

• <CTRL+I> - Immortal
• <CTRL+Z> - Full ammo
• <CTRL+F> - Destroy target

At the Mission computer press ctrl+F1 .
Then You can enter one or more of the following codes. All the codes are case sensitive !!! Correct codes will be confirmed by a beep.

Here are the codes:

Brass Clue - Activates Amunition Key
Mother Mourn Us - ???
Chaste Coed - View the end video sequences.
Rotted Drop - Activates Destroy Target
Horny Elk Leer - Activates all targets on radar key
O'Sarge - ???
Swiss Throat - causes the driver/trainer in practice/training mode to speak with a swiss accent.
A Mere Fart - ???
A Scramble On - ???

In-Game-Keys :

CTRL+B - Teleport Behind Target
CTRL+P - All targets on radar