Here are some cheats and tips for the game Quake.
Debug Mode:
Go to the password screen and put in “QQQQ QQQQ QQQQ QQQQ”. The game
will say it’s incorrect, but if you go to the OPTIONS menu you’ll find
a new DEBUG entry. In it you’ll find God Mode, Level Select, All
Weapons and more!
No clipping mode:
Enter NOCLIP as a password to pass through walls.