To activate the codes listed, press the Esc key, go to Options to enter the Quake Console. Once the Console appears, type in the code and press Return. To leave the Console and resume playing the game, press the Esc key once more.

Or you can simply hit the ~ key during gamplay. Thanks to AlexTk1 (telthoa@prin.edu) for supply this cheat!

• COLORxx-Changes player clothing color; xx is a range of colors from 00 to 13
• FLY-Toggles flying mode on and off
• GAMMA#.#-Alters screen brightness; #.# is brightness level from 0.0 to 1.0
• GIVE #-Gives the numbered weapon (i.e. GIVE 7 would give you the rocket launcher).
• GIVE C ###-Change Cells to ###
• GIVE H ###-Change Health to ###
• GIVE N ###-Change Nails to ###
• GIVE R ###-Change Rockets to ###
• GIVE S ###-Change Shells to ###
• GOD-Toggles god mode on and off
• IMPULSE 9-All Weapons and Keys
• IMPULSE 11-Next Sigil (the things you get at the end of an episode)
• IMPULSE 255-Turns on quad damage
• KILL-Suicide
• MAP E#M#-Level Warp
• NAME-Changes player name
• NOCLIP-Toggles clipping on and off
• NOTARGET-Monsters ignore you until you shoot at them. Thanks to Matt (matt@jump.net) for the cheat!
• REGISTERED 1-In multiplayer to access all the weapons (Shareware version)
• SKILL #-Set Skill to # (0-EASY, 3-NIGHTMARE)
• STATUS-Displays info on the current game
• SV_GRAVITYxxx-Gravity: xxx represents a number from 00 (no gravity) to 850 (normal gravity)
• VERSION-Displays Quake version info