Cheats
Yes. You need to run the game with an argument "-console". Then in game press the tilde key (`) and the console will be shown. Then you can enter next commands:
- ai enable - enable enemies ai
- ai disable - disable enemies ai
- god - toggle god mode
- give all - give all weapons, ammo and keys
- noclip - toggle noclipping
- moon - moon gravity
- earth - reverts previous cheat
- map next - moves to a next map
- goto [index] - moves to a map with a certain index (according to list, starting with 0)