To activate the following cheats, start the game with the "+set thereisacow 1337 +set developer 1 +set sv_cheats 1 +set monkeytoy 0" command line parameter. During gameplay, press ~ to display the console window. Enter the corresponding codes at the console window. To disable a cheat, enter it a second time. Note: If a message appears that states "sv_cheats are read only", then type "setrandom sv_cheats 1" in the console before activating the codes. If a message appears that states "cheats are not enabled on this server" then type "spdevmap [map name]" in the console before activating the codes:

CHEAT FUNCTION - CHEAT CODE
Invincibility - god
Full health - give health
Get all items - give all
Get ammo - give ammo
Ignored by enemy - notarget
No clipping mode - noclip
Fly mode - ufo
Toggle debug mode - debug [0-1]
Toggle developer mode - developer [0-1]
Teleport to a specific map - node    jumptonode
Play inputted map - map [map name]
Spawn inputted item - give [item name]
List all cvars - cvarlist
Dump all cvars to console - cvardump
Reset all cvars - cvar_restart
List all console - commands    cmdlist
List all shaders of current map - shaderlist
List all images of current - map    imagelist
List all sounds currently - used    snd_list
List all entities currently - used    entitylist
List all currently bound keys - bindlist
View graphics information - gfxinfo
Commit suicide - kill
Save game - savegame
Load saved game - loadgame
Reset variable to default value - reset [variable name]
Play a cinematic file - cinematic
Set crosshair transparency; default is 1.0 - cg_crosshairAlpha [number]
Set gravity value; default is 800 - g_gravity [number]
Set HUD transparency; default is 1.0 - cg_hudAlpha [number]
Set seconds that dead bodies remain on-screen - ai_corpsecount [number]
Set shellshock duration - cg_shellshock [number]
Set skill level - g_gameSkill [number]
Set weapon knockback power; default is 1000 - g_knockback [number]
Set game speed; 0.5 is half speed, 1 is default - timescale [number]
Show miss distance when hitting NPCs - cg_showMiss [0-1]
Spawn inputted model - testmodel [model name]
Free movement while paused - cl_paused 2
Return to normal paused screen - cl_paused 0
Toggle AI - g_ai [0 or 1]
Toggle bullet debug mode - g_debugBullets [0 or 1]
Toggle bullet marks - cg_marks [0 or 1]
Toggle console debugging - con_debug [0 or 1]
Toggle crosshair - cg_drawCrosshair [0 or 1]
Toggle ejecting shells - cg_brass [0 or 1]
Toggle entity bounding boxes - g_drawEntBBoxes v
Toggle fog - r_fog [0 or 1]
Toggle framerate display    - cg_drawFPS [0 or 1]
Toggle FX - fx_draw [0 or 1]
Toggle FX debugging - fx_debug [0 or 1]
Toggle FX freezing - fx_freeze [0 or 1]
Toggle fx. If set to 0, fx will be disabled - fx_enable [0 or 1]
Toggle game timer - cg_drawTimer [0 or 1]
Toggle hit debug mode - g_debugShowHit [0 or 1]
Toggle HUD - cg_drawStatus [0 or 1]
Toggle HUD and crosshair - cg_draw2D [0 or 1]
Toggle letterbox format - cg_letterbox [0 or 1]
Toggle NPC health display - g_debugDamage [0 or 1]
Toggle objects and backgrounds - r_drawWorld [0 or 1]
Toggle objects and NPCs - r_drawEntities [0 or 1]
Toggle player and AI movement debug mode - g_debugMove [0 or 1]
Toggle player and AI movement debugging - cl_debugMove [0 or 1]
Toggle rendring - cg_noRender [0 or 1]
Toggle shadows - cg_shadows [0 or 1]
Toggle spawning - g_spawnai [0 or 1]
Toggle subtitles - cg_subtitles [0 or 1]
Toggle third person view - cg_thirdPerson [0 or 1]
Toggle vehicle debug mode - g_vehicleDebug [0 or 1]
Toggle wireframe mode - r_showtris [0 or 1]