While playing a game, type "GONZO1982" or "1982GONZO" to enable cheat mode. Then, enter one of the following codes to activate the corresponding cheat function:

Instead of typing 1982GONZO or GONZO1982, you can also try GONZOOPERA. (no zeros)

Now you have following Options:

SHIFT+V - Invisible to Enemy
SHIFT+X - Tele-transport. (look with your mouse for an place for your Figur)
CTRL+I - Invincibility
CTRL+SHIFT+N - Finish the Mission
STRG-I - God-Mode for Soldiers,
STRG+SHIFT+N - Win the Mission!.
F9 - Info About the Terrain
SHIFT+F4 - Trace Commandos
CTRL+F9 - Show Debug Output

Mission Codes:

The Asphalt Jungle - 8K2IX
Dropped out of the Sky - 9R291
THor's Hammer - 44G9J
Guess who's coming tonight - 4HSAB
Eagle's Nest - J8TSN
The Great Escape - LUK2L
Dangerous Friendships - DUSLZ