Press ENTER during game play to display the console window. Activate the following cheats by entering the corresponding codes. To disable a code, enter it a second time:

CHEAT FUNCTION - CHEAT CODE
Level skip - winmission
CTRL + Left Mouse Button damages clicked object;
SHIFT + Left Mouse Button heals clicked object - hittingandhealing
Press T and Z to change speed of game - speedhack
God mode - immortalone
Unlimited ammunition - endlessmunition
While in bunker; seeker has all equipment/vehicles/weapons - showtrader
While in bunker; one of each vehicle - allvehicles
While in bunker; spawns new soldier - soldierspawn
Quit game - quitte