Left 4 Dead 2 (Demo) Cheat Codes & Walkthroughs for PC 

Cheat codes, console commands, secrets:
Enter the Steam control panel then select the "My games" tab.
Right Click the "Left 4 Dead 2 Demo" option then select "Properties".
Select "Set Launch options" then enter -console and accept it.
Start the game, and the console window should now appear.
Enter "bind p toggleconsole" as a console command.
Click and close the console window and start a single player game.
Press "P" during game play to display the console window,
then enter "sv_cheats 1" to enable cheat mode.
If the message:
"Can't use cheats now; please exit to main menu and start your own listen
server with "map mapname" so that you could enable cheats."

appears, enable the map c5m1_waterfront or map c5m2_park code.
You will return to the main menu. Enable either map code again,
then enable the sv_cheats 1 code again. You can now enter one of
the following codes.

god [0 or 1] - Toggle God mode for entire team
give health - Gain health
give defibrilator - Defibrillator
give adrenaline - Adrenaline
give first_aid_kit - First aid kit
give pain_pills - Pain Pills
kill - Commit suicide
quit - Quit game
noclip - Toggle no clipping mode
upgrade_add incendiary_ammo - Toggle Incendiary Ammo upgrade
upgrade_add explosive_ammo - Toggle Explosive Ammo upgrade
upgrade_add laser_sight - Toggle Laser Sight upgrade
give weapon_grenade_launcher - Grenade launcher
give melee - Hunter claws
give rifle_desert - Combat rifle
give rifle_ak47 - AK-47
give sniper_military - Sniper rifle
give pistol_magnum - Magnum
give smg_silenced - Silenced SMG
give shotgun_chrome - Chrome shotgun
give shotgun_spas - SPAS shotgun
give tonfa - Nightstick
give vomitjar - Boomer Bile
give electric_guitar - Guitar
give frying_pan - Frying pan
give machete - Machete
give pistol - Double pistol
give pumpshotgun - Pump shotgun
give autoshotgun - Auto shotgun
give smg - SMG
give rifle - M16
give hunting_rifle - Sniper rifle
give molotov - Molotov cocktail
give pipe_bomb - Pipe bomb
give propanetank - Propane tank
give gascan - Gas can
give oxygentank - Oxygen tank
give ammo - Refill ammunition
sv_infinite_ammo [0 or 1] - Toggle unlimited ammunition
z_spawn spitter - Spawn Spitter
z_spawn jockey - Spawn Jockey
z_spawn charger - Spawn Charger
z_spawn zombie - Spawn common zombie
z_spawn mob - Spawn zombie mob
z_spawn boomer - Spawn Boomer
z_spawn hunter - Spawn Hunter
z_spawn witch - Spawn Witch
z_spawn smoker - Spawn Smoker
z_spawn tank - Spawn Tank
Cheat codes, console commands, secrets and system requirements for Left 4 Dead 2 (Demo) free online.