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Left 4 Dead 2 Cheats, Codes, Cheat Codes, Walkthrough, Guide, FAQ, Unlockables for PC
Strategy Guide/Walkthrough/FAQ - Left 4 Dead 2
Strategy Guide/Walkthrough/FAQ - Left 4 Dead 2: Crash Course DLC
Strategy Guide/Walkthrough/FAQ - Left 4 Dead 2: The Passing DLC
Strategy Guide/Walkthrough/FAQ - Left 4 Dead 2: The Sacrifice DLC
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Cheat Codes

At the Steam control panel, Right Click the "Left 4 Dead 2" option, and select "Properties" under the "My Games" tab. In the General tab, select "Set Launch Options", enter "-console" in that field, and accept it. Start the game, and the console window should appear at the main menu. Enter "bind p toggleconsole" as a console command. Then, type one of the following "map [map name]" codes and press [Enter] to load the corresponding map. Note: The same entries can be used with the "changelevel [map name]" or "changelevel [map name]" codes during the game.

Alternately, at the main menu, select "Options", then choose the "Keyboard/Mouse" selection. Enable the "Allow Developers Console" option. Press ~ to display the console window. Enter "bind p toggleconsole" as a console command. Then, type one of the following "map [map name]" codes and press [Enter] to load the corresponding map:

Dead Center

    map c1m1_hotel
    map c1m2_streets
    map c1m3_mall
    map c1m4_atrium

Dark Carnival

    map c2m1_highway
    map c2m2_fairgrounds
    map c2m3_coaster
    map c2m4_barns
    map c2m5_concert

Swamp Fever

    map c3m1_plankcountry
    map c3m2_swamp
    map c3m3_shantytown
    map c3m4_plantation

Hard Rain

    map c4m1_milltown_a
    map c4m2_sugarmill_a
    map c4m3_sugarmill_b (Mill Escape level) map c4m4_milltown_b (Return To Town level) map c4m5_milltown_escape

The Parish

    map c5m1_waterfront_sndscape (Demo level; will glitch graphics until you quit the game) map c5m1_waterfront
    map c5m2_park
    map c5m3_cemetery
    map c5m4_quarter
    map c5m5_bridge

While playing the game, press P or ~ to display the console window. Enter "sv_cheats 1" to enable cheat mode. If you entered the code correctly, the message "Server cvar 'sv_cheats' changed to 1" will appear. You can now enter one of the following codes to activate the corresponding cheat function. Note: Enabling cheat codes will disable achievements from being earned.
Result 	Cheat Code
Toggle God mode for entire team 	god [0 or 1]
Toggle no clipping mode 	noclip
Toggle Incendiary Ammo upgrade 	upgrade_add incendiary_ammo
Toggle Explosive Ammo upgrade 	upgrade_add explosive_ammo
Toggle Laser Sight upgrade 	upgrade_add laser_sight
Toggle infinite ammunition 	sv_infinite_ammo [0 or 1]
Refill health 	give health
Refill ammunition 	give ammo
Get ammo for primary weapon 	impulse 101
Spawn double pistol 	give pistol
Spawn Magnum 	give pistol_magnum
Spawn auto shotgun 	give autoshotgun
Spawn chrome shotgun 	give shotgun_chrome
Spawn pump shotgun 	give pumpshotgun
Spawn SPAS shotgun 	give shotgun_spas
Spawn SMG 	give smg
Spawn silenced SMG 	give smg_silenced
Spawn AK-47 	give rifle_ak47
Spawn M16 	give rifle
Spawn combat rifle 	give rifle_desert
Spawn hunting rifle 	give hunting_rifle
Spawn sniper rifle 	give sniper_military
Spawn grenade launcher 	give weapon_grenade_launcher
Spawn Hunter claws 	give melee
Spawn Boomer Bile 	give vomitjar
Spawn chainsaw 	give chainsaw
Spawn frying pan 	give frying_pan
Spawn guitar 	give electric_guitar
Spawn katana 	give katana
Spawn machete 	give machete
Spawn nightstick 	give tonfa
Spawn Molotov cocktail 	give molotov
Spawn pipe bomb 	give pipe_bomb
Spawn active pipe bomb under you 	boom
Spawn propane tank 	give propanetank
Spawn gas can 	give gascan
Spawn oxygen tank 	give oxygentank
Spawn first aid kit 	give first_aid_kit
Spawn defibrillator 	give defibrilator
Spawn adrenaline 	give adrenaline
Spawn pain pills 	give pain_pills
Spawn a zombie 	z_spawn zombie
Spawn Spitter 	z_spawn spitter
Spawn Jockey 	z_spawn jockey
Spawn Charger 	z_spawn charger
Spawn common zombie 	z_spawn zombie
Spawn zombie horde 	z_spawn mob
Spawn Boomer 	z_spawn boomer
Spawn Hunter 	z_spawn hunter
Spawn Witch 	z_spawn witch
Spawn Smoker 	z_spawn smoker
Spawn Tank 	z_spawn tank
Spawn special Infected 	z_spawn [Infected name]
Level select 	map [map name]
Level select 	changelevel [map name]
Toggle received damage, but cannot die 	buddha [0 or 1]
Toggle if bots do friendly fire damage 	sb_friendlyfire [0 or 1]
Set amount of damage done to survivors 	z_pounce_damage [number]
Set no clipping mode speed; default is "5" 	sv_noclipspeed [number]
Bot teammates shoot nonstop 	sb_openfire or open_fire
Change zombie health 	z_health [number]
Change zombie speed 	z_speed [number]
Set maximum range of Smoker's tongue attack; default is "750" 	tongue_range [number]
Set amount of time before a burning Witch dies from fire 	z_witch_burn_time [number]
Toggle witch to change targets or focus on the survivor that first alerted her 	z_witch_allow_change_victim [0 or 1]
Toggle controllable Boss Infected on any map 	director_no_human_zombies [0 or 1]
Toggle never ending panics 	director_panic_forever [0 or 1]
Force panic event 	director_force_panic
No mob rushes 	director_no_mobs [0 or 1]
Remove all bots 	Ent_Remove
Set damage for a Witch's attack does 	z_witch_damage [number]
Set maximum number of regular zombies 	z_common_limit [number]
Set maximum health of tank 	z_tank_health [number]
Set number of seconds until player loses control of the tank from not attacking survivors 	z_frustration_lifetime [number]
Set probability of infected CEDA agents carrying bile jars 	sv_infected_ceda_vomitjar_probability 0.1
Disable all wanderers, mobs, specials, and Bosses 	director_stop
Third person view 	thirdperson
Over the shoulder third person view 	thirdpersonshoulder
Toggle crosshairs 	crosshair [0 or 1]
Toggle set fixed camera in third person or third person shoulder mode 	thirdperson_mayamode
Disable third person view 	firstperson
Disable all cheats	sv_cheats 0
Commit suicide 	kill or explode
Quit game 	quit
Cheat Codes (demo version)

At the Steam control panel, Right Click the "Left 4 Dead 2 Demo" option, and select "Properties" under the "My Games" tab. In the General tab, select "Set Launch Options", enter "-console" in that field, and accept it. Start the game, and the console window should appear at the main menu. Enter "bind p toggleconsole" as a console command. Close the console window, and start a single player game. While playing the game, press P 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 server with "map mapname" so that you can 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. Then, type one of the following codes and press [Enter] to activate the corresponding cheat function:
Result 	Cheat Code
Toggle God mode for entire team 	god [0 or 1]
Gain health 	give health
Defibrillator 	give defibrilator
Adrenaline 	give adrenaline
First aid kit 	give first_aid_kit
Pain Pills 	give pain_pills
Toggle no clipping mode 	noclip
Toggle Incendiary Ammo upgrade 	upgrade_add incendiary_ammo
Toggle Explosive Ammo upgrade 	upgrade_add explosive_ammo
Toggle Laser Sight upgrade 	upgrade_add laser_sight
Toggle infinite ammunition 	sv_infinite_ammo [0 or 1]
Refill ammunition 	give ammo
Double pistol 	give pistol
Magnum 	give pistol_magnum
Auto shotgun 	give autoshotgun
Chrome shotgun 	give shotgun_chrome
Pump shotgun 	give pumpshotgun
SPAS shotgun 	give shotgun_spas
SMG 	give smg
Silenced SMG 	give smg_silenced
AK-47 	give rifle_ak47
M16 	give rifle
Combat rifle 	give rifle_desert
Hunting rifle 	give hunting_rifle
Sniper rifle 	give sniper_military
Grenade launcher 	give weapon_grenade_launcher
Hunter claws 	give melee
Boomer Bile 	give vomitjar
Frying pan 	give frying_pan
Guitar 	give electric_guitar
Machete 	give machete
Nightstick 	give tonfa
Molotov cocktail 	give molotov
Pipe bomb 	give pipe_bomb
Propane tank 	give propanetank
Gas can 	give gascan
Oxygen tank 	give oxygentank
Spawn Spitter 	z_spawn spitter
Spawn Jockey 	z_spawn jockey
Spawn Charger 	z_spawn charger
Spawn common zombie 	z_spawn zombie
Spawn zombie mob 	z_spawn mob
Spawn Boomer 	z_spawn boomer
Spawn Hunter 	z_spawn hunter
Spawn Witch 	z_spawn witch
Spawn Smoker 	z_spawn smoker
Spawn Tank 	z_spawn tank
Commit suicide 	kill
Quit game 	quit
Quick healing

Use an adrenaline shot, then use your medikit to heal. This takes a much less time, especially when you are dealing with a horde.
Surviving large hordes

Find a corner, and have a melee weapon equipped. Hold [Melee] while aiming at the approaching zombies. Note: You may get hit a few times.
Defeating special Infected

Use the following tactics to kill special Infected:

    Boomer: Shoot at the stomach while staying as far back as possible.

    Charger: Get close to it. This will prevent it from charging, and then it can only inflict melee damage. This makes it easier to kill it with any weapon (melee or gun).

    Hunter: When it is in its pouncing position, use a shotgun to nudge it away, then shoot it in the face. Alternately, use the shove move while it is jumping at you to force it to stumble back, thus preventing it from landing on you.

    Jockey: Get into a huddle with your teammates, and wait for the Jockey to appear. When you see it, all teammates can shoot the Jockey at the same time. Huddling together will prevent it from launching at you. Alternately, use the shove move while it is launching at you to force it to stumble back, thus preventing it from landing on you.

    Smoker: Use a similar strategy as with the Charger. You must get directly in front of it before killing it. The Smoker uses its tongue to grab survivors from far distances, but it cannot do that when you are very close.

    Spitter: Shoot at the head, and be ready to get out of the way when it spits.

    Tank: Go to high ground, and shoot at it while dodging it. In Co-op mode, use a grenade launcher for a frontal assault while your teammates fire at its back with shotguns. Alternately, do not try to deal any damage to the Tank, but instead hide somewhere and let the survivor A.I. kill it.

"Eat Your Brains" song in Swamp Fever: Plank Country

In the bar in the abandoned town, find the jukebox, and play it to hear "Eat Your Brains" by Jonathan Coulton.
Portal reference

In The Parish: The Park, when you reach the bar with the jukebox inside, keep skipping through the songs to eventually hear the song "I'm Still Alive" from Portal.
Easy "A Spittle Help From My Friends" achievement

Start a versus match with friends. Play as the Spitter, and have a friend as the Smoker. Have your friend start choking a survivor with the Smoker, then spit on the survivor with the Spitter while the Smoker is choking them to get the "A Spittle Help From My Friends" achievement.
Easy "Back In The Saddle" achievement

Play against a friend. Jump on the back of a bot as the Jockey, and have your friend melee you off. Run away to recover. Then, jump on a survivor's back to get the "Back In The Saddle" achievement.
Easy "Beat The Rush" achievement
Easy "Dismemberment Plan" achievement

In Dead Center: The Atrium Finale in Survival mode, kill the bots so they do not steal your kills. Then, grab the grenade launcher and a bile bomb. Once the horde starts, throw the bile bomb, and wait for a large number of them to get around it. Then, fire the grenade launcher at the horde around the bile bomb. You should get the "Dismemberment Plan" achievement as long as their were a large number of zombies standing around the bile bomb.
Easy "Fried Piper" achievement
Easy "Gong Show" achievement

In Dark Carnival: The Barns, find the strength-testing mini-game in the first area. Inject adrenaline, and hit it with a melee weapon to get the "Gong Show" achievement.
Easy "Guardin' Gnome" achievement

In Dark Carnival: The Fairgrounds, find the shooting range. Score over 500 points to make a garden gnome appear. Carry the gnome to the end of the level, and board the chopper with it at the end of Dark Carnival: The Concert to get the "Guardin' Gnome" achievement.
Easy "Level A Charge" and "Scattering Ram" achievements
Easy "Robbed Zombie" achievement

In Dead Center: The Streets, reach the "Save 4 Less" store where you must get the cola. Kill all the CEDA agents along the way, and collect the vials of Boomer vomit they drop (not all CEDA agents will drop Boomer vomit). If you still need more vials of Boomer vomit once you reach the store, just set off the alarm, and hordes will keep coming with random CEDA agents.
Easy "Rode Hard" achievement

Start a versus match with friends. Play as the Jockey, and have a friend as the Spitter. Then, jump onto a survivor as the Jockey, and steer them into the Spitter's acid to get the "Rode Hard" achievement.
Easy "Shock Jock" achievement

In Dead Center: The Atrium Finale in Survival mode, have a human survivor go up to the top of the stairs, shoot out an area of the glass railing, and jump off so they die. Then, grab the defibrillator, and revive them. Restart the level again, and repeat this until you get the "Shock Jock" achievement.
Easy "Stache Whacker" achievement

In Dark Carnival: The Barns, find the Whack-A-Mole mini-game. Get a score of 42 to get the "Stache Whacker" achievement.
Easy "The Quick And The Dead" achievement

In Dead Center: The Atrium Finale in Survival mode, kill any bots so they cannot revive the human survivor. Grab an adrenaline shot. Then, go up to the top of the stairs, shoot out an area of the glass railing, and have a human survivor fall off where the glass railing was so they are hanging onto the edge. Inject the adrenaline shot, and revive them. Have them fall off the edge again, and revive them again. Repeat this until you get "The Quick And The Dead" achievement.
Easy "Violence In Silence" achievement

In The Parish: The Cemetery, when you reach the impound lot area with all the cars, just use a melee weapon to kill the Infected. The computer players will not set off an alarm. All the red cars have car alarms, so try to stay by the white cars. Once you make it past the area with all the cars without setting off an alarm, you will get the "Violence In Silence" achievement once you make it to the safe house.
Easy "Wing And A Prayer" achievement

Note: All three other players must be bots for this trick to work. Before the alarm goes off, clear all explosive items and do not use incendiary ammo. Then, crouch in the corner near the exit to the plane so the Infected cannot get you from behind or either side. Once the alarm is sounded and the horde start attacking, throw a Molotov to block the entrance. After that, the computer players should stand in front of you and take the damage. Just stay in the same place the entire time, and you should get the "Wing And A Prayer" achievement.
Steam achievements

Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.

    A RIDE DENIED: Kill a Jockey within 2 seconds of it jumping on a Survivor.
    A SPITTLE HELP FROM MY FRIENDS: As the Spitter, spit on a Survivor being choked by a Smoker.
    ACID REFLEX: Kill a Spitter before she is able to spit.
    ARMORY OF ONE: Deploy an ammo upgrade and have your team use it.
    BACK IN THE SADDLE: As the Jockey, ride the Survivors twice in a single life.
    BARREL ROLLED: Kill a Special Infected with an exploding barrel.
    BEAT THE RUSH: In a Survival match, get a medal only using melee weapons.
    BRIDGE BURNER: Survive the Parish campaign.
    BRIDGE OVER TREBLED SLAUGHTER: Cross the bridge finale in less than 3 minutes.
    BURNING SENSATION: Ignite 50 Common Infected with incendiary ammo.
    CACHE AND CARRY: Collect 15 gas cans in a single Scavenge match.
    CHAIN OF COMMAND: Kill 100 Common Infected with the chainsaw.
    CHAOS GENERATOR: Have all 3 generators running at once in "The Sacrifice" finale.
    CL0WND: Honk the noses of 10 Clowns.
    CLUB DEAD: Use every melee weapon to kill Common Infected.
    CONFEDERACY OF CRUNCHES: Finish a campaign using only melee weapons.
    Connecting Fight: Play a Versus game on Dead Air from start to finish.
    CRASS MENAGERIE: Kill one of each Uncommon Infected.
    DEAD IN THE WATER: Kill 10 swampy Mudmen while they are in the water.
    DISMEMBERMENT PLAN: Kill 15 Infected with a single grenade launcher blast.
    FRIED PIPER: Use a Molotov to burn a Clown leading at least 10 Common Infected.
    FUEL CRISIS: Make a Survivor drop a gas can during overtime.
    GAS GUZZLER: Collect 100 gas cans in Scavenge.
    GAS SHORTAGE: Cause 25 gas can drops as a Special Infected.
    GONG SHOW: Prove you are stronger than Moustachio.
    GREAT EXPECTORATIONS: As the Spitter, hit every Survivor with a single acid patch.
    GUARDIN' GNOME: Rescue Gnome Chompski from the Carnival.
    HEAD HONCHO: Decapitate 200 Infected with a melee weapon.
    HEARTWARMER: In a Versus match, leave the saferoom to defibrillate a dead teammate.
    HUNTING PARTY: Win a game of Scavenge.
    KILL BILL: Have Bill sacrifice himself for the team.
    LEVEL A CHARGE: Kill a Charger with a melee weapon while they are charging someone.
    LONG DISTANCE CARRIER: As the Charger, grab a Survivor and carry them over 80 feet.
    MEAT TENDERIZER: As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
    MIDNIGHT RIDER: Survive the Dark Carnival campaign.
    PRICE CHOPPER: Survive the Dead Center campaign.
    QUALIFIED RIDE: As the Jockey, ride a Survivor for more than 8 seconds.
    RAGIN' CAJUN: Survive the Swamp Fever campaign.
    ROBBED ZOMBIE: Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
    RODE HARD, PUT AWAY WET: As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
    SACRIFIZZLE: As a Special Infected, incap someone who is trying to sacrifice themselves.
    SCATTERING RAM: As the Charger, bowl through the entire enemy team in a single charge.
    SCAVENGER HUNT: Stop the enemy team from collecting any gas cans during a Scavenge match.
    SEPTIC TANK: Use a bile grenade on a Tank.
    SHOCK JOCK: Revive 10 dead Survivors with the defibrillator.
    SOB STORY: Navigate the sugar mill and reach the safe room without killing any Witches.
    SPIT HAPPENS: As the Spitter, hit every Survivor with a single acid patch.
    STACHE WHACKER: Prove you are faster than Moustachio.
    STILL SOMETHING TO PROVE: Survive all campaigns on Expert.
    Stream Crosser: Survive the Cold Stream campaign on any difficulty.
    STRENGTH IN NUMBERS: Form a team and beat an enemy team in 4v4 Versus or Scavenge.
    TANK BURGER: Kill a Tank with melee weapons.
    THE QUICK AND THE DEAD: Revive 10 incapacitated Survivors while under the speed boosting effects of adrenaline.
    THE REAL DEAL: Survive a campaign on Expert difficulty with Realism mode enabled.
    Valve Gift Grab 2011 - L4D2: Collect three gifts dropped by Special Infected in Versus Mode.
    VIOLENCE IN SILENCE: Navigate the impound lot and reach the cemetary safe room without tripping any alarms.
    WEATHERMAN: Survive the Hard Rain campaign.
    WING AND A PRAYER: Defend yourself at the crashed airliner without taking damage.

The following achievements require "The Passing" bonus downloadable content:

    Torch Bearer: Survive The Passing Campaign.
    Port of Scavenge: Play 5 full games of Scavenge on The Port.
    Fore!: Knock off the heads of 18 infected with the golf club.
    Til It Goes Click: Using the M60, kill 25 infected without letting go of the trigger.
    Killing Them Swiftly To This Song: Play the new Midnight Riders song on a jukebox.
    Wedding Crasher: As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
    Cache Grab: Open 5 foot lockers.
    Kite Like a Man: Kill a tank only with damage from the original Survivors.
    Grave Robber: Collect 10 items dropped by a Fallen Survivor.
    Mutant Overlord: Play 6 Mutations.

The following achievements require "The Sacrifice" bonus downloadable content:

    Supreme Sacrifice: Complete "The Sacrifice".
    Kill Bill: Have Bill sacrifice himself for the team.
    Barrel Rolled: Kill a Special Infected with an exploding barrel.
    Chaos Generator: Have all 3 generators running at once in "The Sacrifice" finale.
    Sacrifizzle: As a Special Infected, incap someone who is trying to sacrifice themselves.