Hold Left Shift and press Keypad – at the indicated screen. Release

the keys, then type one of the following codes to activate the corresponding cheat

function.

Code        Result

savegame   - Saves Game (Gameplay Screen)
endmission - End Mission (Gameplay Screen)
campaign   - Unlock Levels (Main Menu)
topography - Unknown Effect (Gameplay Screen) 

Hints

Invincibility:

Start your mission and go until you get to the helicopter. Wait a few seconds

and jump out of the helicopter. Jump out before they start screaming about the

helicopter getting hit. You will become invincible until you go to the Target

area and finish the level.

Thanks to Revolution readers Jobe and Hugo!