Type these cheats/commands into the console (activate console with ~ key)

     FLY         - lets you fly through the levels. Up/down; use [D] & [C] 
                   keys to change height/altitude
     GIVE #      - Give weapon #   (1-8)
     GIVE C #    - Give # of cells   (0-255)
     GIVE H #    - Give # of health   (1-32767) value 0 technically kills
                   you, but the game will not recognize it, use a higher
                   value to restore yourself
     GIVE N #    - Give # of nails   (0-255)
     GIVE R #    - Give # of rockets   (0-255)
     GIVE S #    - Give # of shells   (0-255)
     GOD         - makes you invincible
     IMPULSE -1  - gives you Quad Damage (four times more firepower)
     IMPULSE 9   - All weapons (including Thunderbolt), full ammo & keys
     IMPULSE 11  - gives you a Rune
     IMPULSE 255 - Quad Damage (same as -1)
     KILL        - suicide (restarts level)
     MAP ExMy    - warp to levels (x = episode #, y = level #)
     NOCLIP      - Similar to "IDCLIP" in Doom2. Lets you walk through
                   walls. Good for finding secrets. Use the [D] and [C]
                   keys to move up down
     NOTARGET    - makes monsters oblivious to you unless you attack them
     SKILL (0-3) - selects difficulty level (0 - easy... 3 - nightmare)

Most of the cheat codes were pulled from the Console Commands List, many thanks to Daniel Rinehart! Thanks also to Toby Goldstone; author of "The Unofficial Quake FAQ"

Related Quake resources

Quake Console Commands List

This site contains the most complete and updated list of commands to the elusive "console" or "that drop down menu screen, in which I have no clue what to type!!...." � Well now, you do!
Click here!

Quake Stomping Grounds

Loads of stuff here! Home to one of the many "Clans." They boast to have many expert players, but that's what they all say, n'est pas? All you wanted to know about Quake, but get flamed for asking. ;)
Get Stomped!

Planet Quake

Hmmm, an entire planet devoted to Quake? This site rivals that of Stomped. Oddles of news and info here, after all a planet, you say?
Land on it!

QuakeSpy

Are you ready to take on the world? If you think you've got what it takes, why not seek a challenge on the 'net?
QuakeSpy or QSpy will lookup available Quake servers, gauge the quality of your connection and lists the best ones for play with the built-in TCP/IP support of Quake.
A 28.8k baud or faster modem is recommended. Speed of play will vary depending on the server, and dialup connections will be obviously slower (unless you have direct connect or leased line)! QSpy is currently only available for Win95, no DOS/Win3.x version for the near future, nevermind Mac.
Spy for some victims! Download QSpy here.

id Software

Here's where it all started! With Doom and it's sequels, not to mention Wolf3D (remember that one??) to their name, Quake2 is their most recent baby. Quake 3 coming soon, very soon. This time it's 3D for real!
Go get some! Download the latest stuff here.

How d'ja get that title?

id Software was kind enough to provide a font similiar to the one found in the game, for the masses. It's a TrueType font for Win3.x and quite likely compatible for Win95.
The file is a zipped archive, about 10KB in size: Quake Font
Newer font, also 10KB zipped: Quake 2!