Left 4 Dead Hints & Cheats
Left 4 Dead Cheat Codes
Developers Console Cheats

At the main menu, select "Options," then "Keyboard/Mouse." Enable "Allow Developers Console." During gameplay, press "~" to access the console. Type in "Sv_Cheats 1" and press "Enter" to enable the cheats. Then, enter any one of the following:
Cheat Effect
Ent_Remove Removes All Bots
sv_infinite_ammo 1 Unlimited Ammunition
give pistol Get Pistol
god Invincibility
noclip Toggles No Clipping Mode
give ammo Full Ammunition
z_spawn weapon_SMG Gives you the SMG.
Vocalize Vocalizes/makes the player say anything like vocalize playereatpills
z_spawn mob spawns a zombie horde
z_spawn spawns a special infected (infected names:hunter,boomer,smoker,witch,tank)
give hunting_rifle gives hunting rifle
z_spawn tank Spawns tank at location of crosshair
z_spawn smoker Spawns smoker at location of crosshair
z_spawn hunter Spawns hunter at location of crosshair
z_spawn boomer Spawns boomer at location of crosshair
give health gives full health
give autoshotgun Gives auto shotgun
give pain_pills Gives pain pills
firstperson Play in first person (default); this cheat is only necessary if thirdperson mode is enabled
give rifle Gives you an Mk 47 (machine gun)
thirdperson Sets the camera to be in third person mode.
thirdperson_mayamode Sets the camera to be fixed in place while in either third person or third person shoulder mode. Enter once to turn on and enter again to turn off.
z_health Change Zombie Health
z_common_limit Sets the maximum amount of regular zombies
director_panic_forever 0/1 Enables/Disables never ending panics.
director_force_panic Forces a panic event
z_speed Change Zombie Speed
z_spawn zombie Spawns 1 Zombie
give pipe_bomb gives pipebomb
give propanetank gives propanetank
give oxygentank gives oxygen tank
give molotov gives molotov
give gascan gives gascan
give first_aid_kit gives you first aid kit
fire Spawns a lighted molotov right on the floor under you.
boom Spawns a active pipebomb under you.
z_frustration_lifetime <#> Sets the number of seconds until the player loses control of the Tank from not attacking survivors
sb_friendlyfire <1/0> Sets whether or not bots (and only bots) are allowed to do firendly fire damage
thirdpersonshoulder Sets the camera to over-the-shoulder third person mode
tongue_range <#> (Default 750) Sets the maximum range of the smoker's tongue attack
director_stop Shuts off all wanderers, mobs, specials, and bosses
director_no_mobs <1/0> No mob rushes
z_tank_health <#> Sets the maximum health of the Tank
z_witch_allow_change_victim <1/0> True/False setting that allows the witch to change targets instead or focus on the one survivor that alerted her first
z_witch_burn_time Amount of time before a burning Witch dies from fire (does not affect damage caused by fire)
z_witch_damage <#> Sets the amount of damage a Witch's attack does.
director_no_human_zombies 0/1 Disables/enables controllable Boss Infected on any map
retry You can unlock achievements while using cheats (after entering sv_cheats 1, enter retry so that it will restart the game with the cheats on)
impulse 101 Gives Ammo To Your Primary Weapon
buddha 1 just like god but you receive damage(sometimes if you are the only survivor left you can't receive damage from infected)
z_pounce_damage X amount of damage you want to do to survivors
sb_give XXXX x= desired entity to give to your bot teammates (the console should give you a list)
tongue_fly_speed X x= amount of speed that you want for the smoker's tongue to fly
z_pounce_door_damage X x= desired amount of damage to pounce through doors
sb_openfire or open_fire (console will tell) makes your bot teammates shoot nonstop