Start the game by running aqua.exe -redrum -stendek as the command line. That will enable the following cheat keys:
F10 Auto Mission Completed
F11 Manual Mission Completed
F12 Mission Failed
Create a backup copy of the player_start.des file in the /aquanox/dat/sav folder, then enter "999999" as the number of credits in the new file.
AquaNox: Cheat codes (English)©