Press ' to display the window and type "/cheatcheat", then enter one of the following codes:
God mode: /godmode
Infinite ammunition: /ammo
Flight mode: /fly
God mode, infinite ammo, flight mode: /ac
Invisibility: /invis
Render arrival points: /arrival
Render enemy FOVs: /fovs
Render patrol paths: /pathdraw
Spawn indicated item: /give [number]
Hitler mode: /hitlermode
Follow mode: /ec
Change time of day: /tod [1-5]
Win mission: /winmission
Lose mission: /losemission