- 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 '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.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

15 Points
Fried Piper	Using a Molotov, burn a Clown leading at least 10 Common Infected.
Strength In Numbers	Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Scavenge Hunt	Stop the enemy team from collecting any gas cans during a Scavenge round.
Acid Reflex	Kill a Spitter before she is able to spit.
Great Expectorations	As the Spitter, hit every Survivor with a single acid patch.
A Spittle Help From My Friends	As the Spitter, spit on a Survivor being choked by a Smoker.
Back In The Saddle	As the Jockey, ride the Survivors twice in a single life.
Long Distance Carrier	As the Charger, grab a Survivor and carry them over 80 feet.
Qualified Ride	As the Jockey, ride a Survivor for more than 12 seconds.
Robbed Zombie	Acquire 10 vials of Boomer vomit from infected CEDA agents you have killed.
Clear The Rush	In a Survival round, get a medal only using melee weapons.
Cl0wnd	Honk the noses of 10 Clowns.
A Ride Denied	Kill a Jockey within 2 seconds of it jumping on a Survivor.
Stache Whacker	Prove you are faster than Moustachio.
Head Honcho	Decapitate 200 Infected with a melee weapon.
Armory Of One	Deploy an ammo upgrade and have your team use it.
Burning Sensation	Ignite 50 Common Infected with incendiary ammo.
Septic Tank	Use a bile bomb on a Tank.
Level A Charge	Kill a Charger with a melee weapon while they are charging.
Club Dead	Use every melee weapon to kill Common Infected.
Hunting Party	Be victorious in a game of Scavenge.
Chain Of Command	Kill 100 Common Infected with the chainsaw.
Fuel Crisis	Make a Survivor drop a gas can during overtime.
Gong Show	Prove you are stronger than Moustachio.
20 Points
Weatherman	Survive the Hard Rain campaign.
Meat Tenderizer	As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
Ragin' Cajun	Survive the Swamp Fever campaign.
Rode Hard, Put Away Wet	As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
Heartwarmer	In a Versus round, leave the saferoom to defibrillate a dead teammate.
Dismemberment Plan	Kill 15 Infected with a single grenade launcher blast.
Cache And Carry	Acquire 15 gas cans in a single Scavenge round.
Midnight Rider	Survive the Dark Carnival campaign.
Crass Menagerie	Kill one of each Uncommon Infected.
Price Chopper	Survive the Dead Center campaign.
Scattering Ram	As the Charger, bowl through the entire enemy team in a single charge.
Bridge Burner	Survive the Parish campaign.
Dead In The Water	Kill 10 swampy Mudmen while they are in the water.
Gas Guzzler	Acquire 100 gas cans in Scavenge.
Gas Shortage	Cause 25 gas can drops as a Special Infected.
30 Points
Tank Burger	Kill a Tank with melee weapons.
Sob Story	Navigate the sugar mill and reach the safe room without killing any Witches.
Be victorious ing And A Prayer	Defend yourself at the crashed airliner without taking damage.
Confederacy Of Crunches	Finish a campaign using only melee weapons.
Violence In Silence	Navigate the impound lot and reach the cemetary safe room without tripping any alarms.
Bridge Over Trebled Slaughter	Cross the bridge finale in less than three minutes.
Shock Jock	Revive 10 dead Survivors with the defibrillator.
The Quick And The Dead	Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Guardin' Gnome	Rescue Gnome Chompski from the Carnival.
35 Points
The Real Deal	Survive a campaign on Expert skill with Realism mode activated.
Still Something To Prove	Survive all campaigns on Expert.

20 Points
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.
Cache Grab	Open 5 foot lockers.
Torch Bearer	Survive The Passing Campaign.
25 Points
Fore!	Knock off the heads of 18 infected with the golf club.
Grave Robber	Acquire 10 items dropped by a Fallen Survivor.
30 Points
Port of Scavenge	Play 5 full games of Scavenge on The Port.
Kite Like a Man	Kill a tank only with damage from the original Survivors.
Wedding Crasher	As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Mutant Overlord	Play 6 Mutations.

50 Points
Barrel Rolled	Kill a Special Infected with an exploding barrel.
Supreme Sacrifice	Finish 'The Sacrifice'.
Kill Bill	Have Bill sacrifice himself for the team.
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.

- 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 '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. Rebegin the level again, and repeat this until you get the 'Shock Jock' achievement.

- Easy 'Rode Hard' achievement
Begin 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.

- Surviving large hordes
Find a corner, and have a melee weapon equipped. Keep pushed RB while aiming at the approaching zombies. Notice: You may get hit a few times.

- Easy 'Guardin' Gnome' achievement
In Dark Carnival: The Fairgrounds, find the shooting range. Realize 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 'A Spittle Help From My Friends' achievement
Begin a versus match with friends. Play as the Spitter, and have a friend as the Smoker. Have your friend begin 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 'Level A Charge' and 'Scattering Ram' achievements


- Easy 'Clear 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 begins, 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.

- 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.

- '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.

- 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.

- Avatar Awards
Successfully complete the indicated task to unlock the corresponding Avatar Award:

Left 4 Dead 2 Shirt	Be victorious in ten games of Scavenge.
Bull Shifters Shirt	Be victorious in ten games of Versus.
Depeche Mode Shirt	Rescue Gnome Chompski from the Dark Carnival.
Med Kit	Successfully complete all five campaigns.
Zombie Hand Shirt	Kill 10,000 Infected.

- Easy 'Be victorious ing And A Prayer' achievement
Notice: 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 begin 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 'Be victorious ing And A Prayer' achievement.




- Overcomeing special Infected
Use the following tactics to kill special Infected:


- 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 'Fried Piper' achievement