Quake PC Game Cheats

Cheat Codes:
To enter the ''command line'' press the [~] key at any time during gameplay. Enter the following into the lines and press Enter to enable cheats.

god - Enables God Mode (invincibility)
fly - Enables Fly Mode
kill - Instant death
give S# - Gain # shells
give H# - Gain # health
give N# - Gain # nails
give R# - Gain # rockets
give C# - Gain # cells
give # - Get weapon #
noclip - Walk through walls. Repeat to turn off.
notarget - Monsters won't attack you unless provoked.
impulse 9 - All Weapons.
impulse 11 - Display runes (you don't actually get them)
impulse 13 - Silver key.
impulse 14 - Gold key.
impulse 255 Quad Damage.
map ExMy - Warp to episode X, mission Y
skill # - Sets difficulty level (# = 0-3)
sv_gravity -# - Reduces gravity by #%.

Hidden Picture: The Crypt of Decay
To find the "Dopefish," when you see the exit, turn back go onto the bridge. You should see a quad power-up on a ledge. When you get on the ledge, you will see an extremly small ledge that you can barely walk on. At the end, you can jump into "The Well of Wishes." The Dopefish will be there.

Hidden Picture: The Underearth
To find the weird picture, find all the faces on the walls and shoot each once. You will know which ones you shot because blood will come out only the first time. When you shoot all of them, look for a hallway with a short opening and a villain on each side. One of them will open to a small room with a picture in it.

Nightmare Mode:
Go to the episode 4 entrance and enter the water. Now backup against the wall as if trying to go back the other way. Stay there until you fall again. You should land on a big piece of wood. Walk along the side to find another entrance that leads to the Nightmare gate.

Secret Level:
To find The Underearth level you must be in The Crypt of Decay. When you see the exit, go straight back. You should be in a room with boxes and a button on the ceiling. Shoot the button, then jump on the boxes into the secret room. Push the button, then go to the hidden "Well of Wishes." Now look around the walls and a wall will open for you. When you get out, there will be a underwater doorway that leads to the secret level.

Ziggurat Vertigo:
In episode 1 at "The Grizzly Grotto", after you hit all quake switches after going up the elevator, doors will open to your left and right. Enter one and hit the switch. Do the same thing again on the other side. It will say "A secret cave has been opened." Go to the water. when you enter, look around. You will see a cave opened where a portal leads you to Ziggurat Vertigo.