Display the console at any point in the game (during
game play or at any screen). Type /sv_cheats 1 then enter
/devmap
Use the one of the following values for :
q3dm or q3tourney
Or, you can use any custom map (leave off the map extension
*.bsp)
The game will load in single-player mode with the current settings
of the bot variables, and cheat mode enabled. Enter one of the
following console commands to activate the corresponding cheat
function. Note: Cheats will not work in the demo version.

Code
All skills unlocked at skill 1 /iamacheater
All skills unlocked at skill 100 /iamamonkey
Toggle God mode /god
Toggles no clipping mode /noclip
All weapons and ammo1 /give all
Spawn indicated item /give
Change view range /cg_thirdpersonrange
Change view angle /cg_thirdpersonangle
Change gravity2 /g_gravity
Hidden Sarge skin /model sarge/krusade
Set team model /team_model
Quad damage /give quad damage
Flight ability /give flight
Invisibility /give invisibility
Move faster; default is 320 /g speed
Regenerate damage /give regeneration
Invincible against lava, drowning, acid and similar hazards
/give battle suit
100 health over the limit /give mega health
Use indicated character head /headmodel *
Use indicated head for team /team_headmodel *
Set rail gun trail time /cg_railtrailtime
Set gravity /g_gravity
Third person view /cg_thirdperson 1