DOOM 3 COMMANDS LIST
--------------------
god 				- God mode
noclip 				- No clip
notarget 			- Invisibility
freeze 				- Freeze everything
doomhell 			- Jump to the last level
give all 			- All weapons and ammo
give doom95 			- Load the '95 version of Doom
give keys 			- All keys
give weapon_machinegun 		- Machinegun
give weapon_shotgun 		- Shotgun
give weapon_plasmagun 		- Plasmagun
give weapon_bfg 		- BFG
give weapon_chainsaw 		- Chainsaw
give weapon_rocketlauncher 	- Rocket launcher
spawn [character name] 		- Spawn a character
map [map name] 			- Load a map
benchmark 			- Game benchmark
com_drawfps 1 			- Show FPS
aviDemo 			- Saves a demo of your playing to an AVI movie file
gfxinfo 			- Graphics card infomation
status 				- Shows game status
quit 				- Quit game

Below is the rest of the codes with unknown effect. Play around with them yourselves!

_use
_moveRight
_moveLeft
_moveDown
_forward
_back
_right
_left
_lookDown
_lookUp
_attack
_moveUp
_speed
_strafe
_button7
_button6
_button5
_button4
_button3
_button2
_button1
_button0
aasStats
addarrow
addline
blinkline
bindlist
bind
centerview
compressDemo
connect
clearlights
conDump
clear
cvar_restart
cvarlist
combineCubeImages
crash
collisionModelInfo
dirtyfeet
dir
demoShot
disconnect
dmap
echo
envshot
exec
exportmodels
editSounds
editLight
editor
error
fillrate
flashlight
focusSoundsEditor
game_memory
in_restart
kill
killRagdolls
killMoveables
killMonsters
keepTestModel
listModels
listSkins
listMaterials
listImages
listModes
listLightDefs
listEntityDefs
listMonsters
listEntities
listThreads
listSounds
listAnims
listCollisionModels
listlines
listVertexCache
modulateLights
noclip
notarget
nextanim
overlayGUI
path
poplight
parsewait
printShader
printMode
playDemo
playCmdDemo
playerModel
prevanim
reload
reloadSounds
reloadSoundShaders
reloadFx
reloadanims
reexportmodels
removeline
runReach
runAAS
recordCmdDemo
recordDemo
recordCmdDemo
recordDemo
renderbumpFlat
renderbump
roq
reloadGuis
reset
regenerateWorld
reloadImages
reloadShaders
reloadModels
script
reloadEntityDefs
s_musictrack
s_cacheInvalidate
s_cacheInfo
s_restart
seta
set
setviewpos
setStepGamma
setu
sets
sizeDown
sizeUp
screenshot
spawnServer
stopRecording
say
testTrace
testImage
testShader
testBump
testLight
touchFx
touchGui
touchFile
toggle
testSIMD
touchMaterial
testFx
touchSound
listSoundShaders
touchParticle
testDamage
testblend
testanim
testParticle
testModel
testWipe
testGUI
timeDemo
testmap
touchSkin
touchModel
unbind
unbindall
vid_restart
vstr
writeConfig
writePrecache
weapon
weapnext
where
weapprev
weaponSplat