Invincibility:
Start the game with the WC2 Origin -k command line (case-sensitive). 

Level Select:
Start the game with the WC2 Origins m w command line (case-sensitive).

Cheat Mode:
Start the game with the WC2 Origin command line (case-sensitive). 
Enter one of the following codes to activate its cheat function. 

Function – Code

Increase frame duration - Alt + Keypad Plus 
Decrease frame duration - Alt + Keypad Minus 
Toggle eject siren - O 
Display current intelligence factor - I 
Destroy cockpit sections - Alt + O 
Inverse graphics - Ctrl + Alt + S 
Destroy targeted ship - Alt + Delete 
Destroy all non-capital ships - Alt + Insert 
Show memory use - Alt + M 
Self-destruct - Alt + Z