At the main menu, select "Options", then "Keyboard/Mouse". Enable "Allow Developers Console". During gameplay, press "~" to access the console, then input the cheat.

Effect	Code
(Default 750) Sets the maximum range of the smoker's tongue attack	tongue_range [#]
Amount of damage you want to do to survivors	z_pounce_damage X
Amount of time before a burning Witch dies from fire (does not effect caused by fire)	z_witch_burn_time
Change zombie health	z_health
Change Zombie speed	z_speed
Commits suicide	kill
Commits suicide	explode
Disables/enables controllable Boss Infected on any map	director_no_human_zombies 0/1
Enables/Disables never ending panics	director_panic_forever 0/1
Forces a panic event	director_force_panic
Full Ammunition	give ammo
Get pistol	give pistol
Give Ammo to your primary weapon	impulse 101
Give auto shotgun	give autoshotgun
Give first aid kit	give first_aid_kit
Give full health	give health
Give gascan	give gascan
Give hunting rifle	give hunting_rifle
Give molotov	give molotov
Give oxygentank	give oxygentank
Give pain pills	give_pain_pills
Give pipe bomb	give pipe_bomb
Give propanetank	give propanetank
Give you an MK 47 ( machine gun )	give rifle
Give you the SMG	z_spawn weapon_SMG
Gives bile bomb	give vomitjar
Gives chainsaw	give chainsaw
Invincibility	god
Just like god but you receive damage (sometimes if you are the only survivor left, you can't receive damage from infected	buddha 1
Makes your bot teammates shoot nonstop	sb_openfire or open_fire (console will tell)
No mob rushes	director_no_mobs [1/0]
Play in first person (default), this cheat only necessary if thirdperson mode is enabled	firstperson
Removes all bots	Ent_Remove
Sets probability of infected ceda agents carrying bile jars	sv_infected_ceda_vomitjar_probability 0.1
Sets speed in noclipping mode (default is 5)	sv_noclipspeed #
Sets the amount of damage a Witch's attack does	z_witch_damage [#]
Sets the camera to be fixed in place whle in either third person or third person shoulder mode. Enter once to turn on and enter again to turn off	thirdperson_mayamode
Sets the camera to be in third person mode	thirdperson
Sets the camera to over the shoulder third person mode	thirdpersonshoulder
Sets the maximum amount of regular zombies	z_common_limit
Sets the maximum health of the tank	z_tank_health [#]
Sets the number of seconds until the player loses control of the tank from not attacking survivors	z_frustration_lifetime [#]
Sets whether or not bots (and only bots) are allowed to do friendly fire damage	sb_friendlyfire <1/0>
Shuts off all wanderers, mobs, specials, and bosses	director_stop
Spawn 1 zombie	z_spawn zombie
Spawn a active pipebomb under you	boom
Spawn a special infected	z_spawn [bossname]
Spawn a zombie horde	z_spawn mob
Spawn boomer at location of crosshair	z_spawn boomer
Spawn hunter at location of crosshair	z_spawn hunter
Spawn smoker at location of crosshair	z_spawn smoker
Spawn tank at location of crosshair	z_spawn tank
Toggles no clipping mode	noclip
True/false setting that allows the witch to change targets instead or focus on the one survivor that alerted her first	z_witch_allow_change_victim [1/0]
Unlimited ammunition	sv_infinite_ammo 1