Achievements

• This can be acquired by completing the campaign on any difficulty.
• "Mercy killer" is another term for euthanasist, someone who kills another to put them out of pain or misery.

• This can be acquired by completing the campaign on any difficulty.
• Crash-Proof is a parody of bullet-proof.

• This can be acquired by completing the campaign on any difficulty.
• A toll collector is someone who collects a toll that must be paid for using a bridge, ferry, or other tolled transportation.

• This can be acquired by completing the campaign on any difficulty.
• This achievement's name is a parody of the Red Baron.

• This can be acquired by completing the campaign on any difficulty.
• The Grim Reaper is the mythological physical embodiment of death, who is often portrayed with a scythe (a traditional farming tool).

• A common myth is that silver bullets are effective in slaying werewolves.

• A play on words of the term "silence is golden."

• This requires you to shoot a Smoker who has grabbed a player. It takes until the Smoker drags the character directly to the Smoker before the Smoker can deal damage.
• Just as the Survivor is grabbed by Smoker quickly melee the Survivor or shoot the Smoker
• Smokers inflict dragging damage in Versus mode, it is easier to achieve this in the other modes.
• There is evidence of this achievement appearing in Left 4 Dead 2.

• This can be easily completed with any weapon as long as one can aim at the head.
• Aim specifically for the heads of attacking Infected. Also, when walking through quiet parts of the game, try to headshot the Infected that don't notice you're there. Use the sniper rifle for more accurate headshots.

• You MUST shoot the Smoker as soon as it grabs you. You have roughly a second to kill the Smoker.
• If the Smoker grabs you by its tongue, quickly turn and shoot him. Assault Rifle or Hunting Rifle is preferred due to their long range. If you wait long enough you will be constricted and won't be able to kill him.
• A tongue-twister is a phrase that is difficult to say

• While you or another Survivor is covered in bile, throw a pipe bomb to lure away most of the Infected. This should leave you with a good chance of receiving no damage.
• Try to be vomited in a room with a single entry. That way you and your teammates can cover the entrance easier. The preferred weapons are the auto shotgun and the assault rifle. Try not to hit your teammates during the attack. You can also try throwing a pipe bomb. Note that the time you count as being "vomited on" is sightly longer than the time your screen is covered in bile, so the safest option is to wait until you get the achievement notification.
• Blind luck is a term for a favorable outcome when the affected party had little opportunity to affect the outcome. Here, blind refers to the Survivors' visions being blurred by the vomit.

• Throw a pipe bomb when you see a large horde approaching, such as a panic event. Also throw a pipe bomb if you enter a large area filled with idle Infected.
• You can fulfill this achievement either by throwing a pipe bomb or by blowing up explosives. This achievement should be attempted in finales or crescendo events, as at those times there are a lot of Infected in large groups. A perfect instance to do this is the start of Dead Air where there is a pipe bomb on the table. All you need to do is pick it up and throw it over the wall at the Infected without opening the door.
• A pyrotechnician is someone who specializes in the handling of explosives, usually for entertainment purposes.

• Whenever you shoot an Infected attacking another person, a message will pop up saying you just protected that person. You must do this 50 times. This is gained by using melee or shooting to get Hunters and Smokers off Survivors, or shooting a Common Infected that is attacking an unaware Survivor in the back.
• Watch your teammates' backs excessively when a horde is attacking. You can get this achievement just by playing long enough.

• Best done in a campaign on easy with human players (AI's make no effort to avoid the Tank's thrown rocks.) When a Tank attacks, run away from it while focusing all fire on it. Tanks on easy will die in a matter of moments from concentrated gunfire.
• Your health needs to be 40% or above to outrun the Tank. Try to be in an open space when faced with a Tank. If The Tank charges at you, run backwards as fast as you can but don't get separated from your teammates. If the Tank picks up some rubble, change your position. Try to engage the Tank with medium to long range weapon such as assault rifles. Attacking the Tank with auto shotguns is dangerous, because he has great speed and you must be in a close range to do proper damage to him.
• "Tankbuster" is military slang for an anti-tank weapon.
• This also may be a reference to the movie "Ghostbusters", as there are four of the ghostbusters and four Survivors in Left 4 Dead.

• You must shoot a Smoker to death while someone else is being dragged toward them. When someone gets grabbed, aim at the Smoker and shoot it to death (They die pretty easily.)
• You can free Survivors by using your melee attack on them or by killing the Smoker, but you must do it before they are actually constricted.

• This is an easy achievement to get. Once a Survivor dies, they will respawn in a closet. This happens after 1 minute, and after the rest of the Survivors move a certain distance from the dead body. Once the Survivor respawns, they will call out. They will have an orange outline while in a closet. Once found, open the closet to save them. This doesn't work if your teammate does it; you have to be the one to open the door.

• You must free a pinned Survivor by using melee to hit the Hunter off him or her. You don't need to kill the Hunter, just beat him away.

• Using Molotovs or Gas cans is the only way to gain this achievement. You must light 101 Infected on fire. Throw a Molotov in the path of a charging Horde to light them all on fire.
• To set Infected on fire, you must throw a Molotov cocktail at them or light a gas can when they are near it. A molotov is recommended because of its large area of effect and longer burn. A tactic that is useful is during a Panic Event, Crescendo Event, or a finale is to throw the molotov where the Infected are coming from, or in a central area, and you should get this achievement. Note that this is a cumulative achievement, which means that every time you burn an Infected, it adds up. You don't need to burn all 101 at once.
• This achievement's name is a parody of 101 Dalmatians.

• During most finales you will fight a Tank. Simply set it alight by either throwing a Molotov in it's path, or shooting a Gas can near it. Easier to do in campaign; AI Tanks will do nothing to avoid a Molotov fire and will gladly charge right through it.
• In the starting safe room of every the No Mercy finale, there will be a molotov. A Tank will always spawn in a finale; usually there are two. Simply throw the molotov when the Tank is in a good position and the achievement will be earned. Try to throw a molotov at him when he's climbing up something or throwing concrete.
• The Towering Inferno is a movie about a skyscraper being set on fire.

• Pipe Bombs or a propane tank will cause a Tank to stumble around, and doing so will unlock the achievement. it also reuses the image from the cround cover achievement

• If you get the Cr0wnd achievement, then you will also get this achievement. Focus on that achievement if you want both.
• Startle a Witch from a distance and have everyone focus fire on her. If you do, she will likely die before reaching you.
• Alternately, it is possible to kill a Witch with a few well-placed headshots from an auto-shotgun.
• Real life witch-hunters were active prior to the 1700s.

• While on the ground, you must kill a Hunter or Smoker who has pinned someone, or kill a special infected who is in close enough proximity to another survivor to count as protecting them. It is possible, though unlikely, to get this achievement by scoring the killing shot on a tank.
• Best done in versus. Infected players like to pounce whoever is reviving you. When they are pinned, shoot the infected to death.
• Usually after being incapacitated, another Survivor will attempt to lift you back to your feet. It is very common that while the Survivor is pulling you up, he or she may be struck by a Hunter or pulled by a Smoker. As soon as you see this happen, begin blasting the Hunter or Smoker with your Pistol. The Special Infected will go down faster than you think, and the achievement will be yours. The reason this is not too easily earned is due to a small luck factor that affects it. This is because the chances of another Survivor being pounced or dragged is quite slim if you are in a group of good players. It happens often in Versus, since the Infected will focus on your teammate while he's helping you.
• Another way to get this achievement is to throw a molotov at your feet a few seconds before a Hunter pounces you. (Make sure it's actually targeting you and not another Survivor, or you'll just waste health.) The fire damage coupled with the Hunter mauling you should be enough to incapacitate you, and as long as no other Survivors interfere, the flames should kill the Hunter before you're killed, ironically giving you the achievement for saving yourself.

• When things are quiet, simply approach an Infected that has not yet noticed you and melee it in the back.
• It is easier to attain this achievement in buildings and rooms where the Infected have a tendency to face the wall, leaving their backs open to an easy melee attack and subsequent kill.
• If a Survivor has been swarmed by a horde, run up to the swarm and melee the Infected in the back.
• A spinal tap is a real life medical procedure to collect cerebrospinal fluids, which can aid in various diagnoses.
• Spinal Tap is also a band

• You must melee a Hunter as he is flying through the air.
• Getting this achievement is a combination of luck and timing. Hit melee the instant before a pouncing Hunter reaches you.

• Simply throw a Molotov at a Witch as she is on the ground. Be ready, however, she will still attack you while on fire.
• This achievement is a reference to the Salem witch trials and witch-hunting in general.
• Note:This can also be achieved by lighting a witch on fire with a gas can.

• This can be acquired on any campaign on any difficulty. During the finale, all 4 Survivors must get into the rescue vehicle.
• This achievement maybe a reference to the movie Blackhawk Down

• This is unlocked by simply winning any round of a Versus campaign in Crash Course.

• Grab an assault rifle or auto shotgun, crouch down and fire full auto at the Hunter as it jumps toward you.
• A Jump shot is a basketball move, where you shoot the ball after you jump into the air. Here it's a play on that term: They jump, you shoot.

• This will usually require an open space. Melee the Boomer, retreat while he's stunned and shoot him.
• A clean kill is a term used by hunters and shooters to refer to a kill that was done with one hit and resulted in little blood being spilled.
• There is evidence of this achievement appearing in Left 4 Dead 2.

• This is acquired in the Crash Course Campaign, when the generator shuts off. Turning it on within 30 seconds will unlock this achievement.

• This can be frustrating to get in single-player, as usually if your health falls below half, a fellow AI Survivor will heal you.
• If you play with the AI and you don't want them to heal you, select your first aid kit in your inventory. Also having pill health and no permanent health will count.
• A Dead Giveaway is something that immediately reveals an object or person when they are hiding, such as someone's favourite hat or a particular logo.

• You only have to help Survivors onto their feet 50 times. You do NOT have to heal them.
• Helping up Survivors incapacitated due to friendly fire still counts towards this achievement, even if your friendly fire caused them to be incapacitated.

• Can be done on any difficulty except easy by downing a team mate while in the safe room, then helping them up as they are incapacitated outside of the room. (Note: This seems to have changed. Your ally must be downed by an Infected for this achievement to count.)

• Simply give your pain pills to 10 Survivors. They must use the pills for it to count toward the achievement.
• A pharmacist is someone who deals with the distribution of medicine to its users.

• This can be done on any difficulty, so easy would probably be the best choice. Healing a little earlier than you normally would will probably help.

• Simply provide 25 Survivors with first aid.
• Field medic is another term for combat medic, someone who provides medical aid to people engaged in battle.

• This only requires you to get through ONE campaign without startling a Witch. Simply listen for the signs on a Witch. Cr0wn-ing her will not count as startling her. Only when it says "x has startled the Witch" will it count against the achievement. If she is directly in your way, have one-two people run by her at a time.
• Play on Easy. There will be some instances where a Witch is literally sitting IN a doorway you must pass through, and cr0wn-ing will be necessary. Cr0wn-ing is obviously easiest to do on easy.
• "Do Not Disturb" signs are usually outside rooms on doornobs in places such as hotels and dorms whenever the person(s) inside do not wish to be interrupted or disturbed by other people. This aplies to the Witch's dislike of being disturbed by The Survivors.

• You may use single or dual pistols. You can use environmental advantages but you cannot use primary weapons or the minigun.
• In order to prevent accidental firing of a primary weapon, do not pick one up. This is especially useful after using a First aid kit, consuming pain pills, or being revived, as after these actions have finished, you automatically revert to selecting your primary weapon which could lead to accidental firing, especially during intense situations.
• Molotovs and Pipe bombs may still be used.
• Use pistols to your advantage since when crouching they have very high accuracy and which they can take out Smokers or Boomers from quite a distance away.
• When you are forced to fight a Tank or a Witch let the bots take care of them. Stay out of the way and avoid engaging them, as the pistols are not powerful against either of them if they close in.
• Although its original meaning is starkly different, dual wielding is sometimes called akimbo style.
• An easy way to get this Achievement is to play through No Mercy on easy and stay low when a Tank spawns.

• Cr0wn simply means to kill a Witch without startling her. Because of this you can get cr0wned using the hunting rifle, contrary to popular belief. A shot to the head using the hunting rifle causes her to stumble, but she won't be started until the stumble wears off. This gives you roughly 3 or 4 seconds to run over to her and melee her while shooting her. She will not be startled during all of this if you don't give her the chance to and you can get the achievement. See also: Modern Way To Kill Witch 2009
• Sneak up right behind a Witch. She will not attack right away and slowly get up. Aim the shotgun right at her head. When she stands up and is about to be startled, shoot her right in the head. You will have some time to aim before she becomes startled, but don't take too long.
• Don't go for this achievement if you are actually trying to beat the campaign. Play on single-player for the exclusive reason of earning this achievement. That way, you won't have to worry about screwing up.
• With some luck, the witch may spawn within sight and range of a mounted gun. With a little more luck, you can Cr0wn her by firing upon her with that mounted gun.
• This achievement's name is a pun, but the basis of the pun is disputed. Some feel it is a combination of "crone" and "0wnd", other say it is a "1337" form of crowned (per verb defs. 5 & 6).

• "Simply" survive one campaign on expert to get these achievements.
• Only the Survivors who make it to the rescue vehicle will get this achievement.
• It's very satisfying when you get the Achievement after all the hard work of playing through the campaign.

• Best done on easy single-player. Listen for the sounds of a Tank growling before the he actually attacks. Turn on your subtitles to help. When you hear the Tank, change the difficulty to expert and kill your AI companions to prevent interference. Change the difficulty back to easy and take on the Tank. With a Tier 2 weapon, a Survivor on his own won't have too much trouble taking the Tank down.
• Catch him on fire, don't let anyone shoot him, and just run away until he burns.
• This achievement is a reference to the Unknown Rebel. It may also be a reference to the TV show Man vs. Wild.

(NOTE: Being healed by another Survivor counts, too)

• Note that you CAN consume pain pills.
• If you attempt this with AI players who then try to heal you, in order to cancel this, select a First aid kit you have in your inventory, otherwise there is no way to stop the AI from healing you. However, you will have to constantly stop and do this, every few moments. It is generally a much better idea to do the achievement with human players and on easier difficulties such as Easy or Normal mode.
• If you are playing an online campaign, going idle before the heal process completes will allow you to be healed, but won't count against the achievement. This way, you can be healed and still get Unbreakable.

• There are glitches which can help with this achievement. See the finale pages to get more tactics.
• You can start a campaign from the finale, remove bots from the game using the console and the command "kick BotName" (e.g. kick Louis) and still be awarded this achievement.

• This is a combination of luck, skill and subtle mathematical use.
• Always hit nothing but melee if you hear a Boomer. All it takes is one trigger-happy Survivor to ruin it for everyone.

• Although friendly fire does not cause damage on easy, it still registers as friendly fire and the achievement will not be unlocked.
• When a Survivor is surrounded, allow him to help himself, or use melees to assist him.
• This can be easily done on a campaign where the other three players are bots, because they won't accidentally friendly fire. As long as you avoid hitting the bots, you'll get the achievement.
• This can also be done by 4 players meleeing through the entire campaign, although it is impossible to deal with the Tank head-on in this way.
• The image of the achievement might be a hint to use the Hunting Rifle as it is more precise than the other full auto weapons and has less chance of hitting another Survivor.

• In finales & Crescendo Event, there is usually a mounted Minigun. Use it as frequently as possible.
• There are miniguns at each finale except for Blood Harvest, along with certain crescendo events. These are the first crescendo event in No Mercy, and the third crescendo event in Death Toll. Use these miniguns enough and you will gain this achievement. A somewhat useful trick is to throw a pipe bomb in front of the line of sight of the minigun and kill the infected that gather.
• "Red mist" a term for a cloud of blood.

• "Simply" complete all the campaigns on expert to get this achievement.
• A 'cheat' for this is to play campaign online with more than 2 Players at least and then do Chapters 1-4 on a campaign on Easy; then when you're at the finale, don't open the saferoom door and vote to return to lobby and change the chapter of the campaign you were doing to the Finale and the difficulty to Expert and then you only need to finish the finale on expert and not the whole Campaign.

• Special Infected are usually very tenacious, so use your weapons with equal tenacity.
• It is possible to do this on versus mode, just gather up a group of friends and when playing as infected, do not harm the survivors in any way. Unless an there has been an update this has been confirmed to work on Crash Course in Versus. It is possible that it would work on other campaigns but Crash Course is much easier to complete as it is only 2 chapters. (This may only work on the 360 Version.)
• An easy way to get this achievement (only works on 360 Version) is to play campaign online with recommended of 1-3 other players and then do Chapters 1-4 on a campaign on any difficulty (Easy difficulty recommended) and when at the Finale don't open the saferoom door (or it'll mess it up) and have everyone vote to return to lobby. When at the lobby the Host of the room changes the Chapter of the campaign you were doing to the Finale. Then when the game is started; this is when you can't take damage from Special Infected; so basically its only surviving the campaign on the Finale without any Survivors taking damage from Special Infected and not the whole campaign.

• This is unlocked by killing 5,359 Zombie within the two maps of the Crash Course campaign.
• This can easily be achieved by playing the Truck Depot Finale on easy and not boarding the bus when it is ready.
• This is an obvious reference to the Zombie Genocidest achievement also from this game. The difference is this one requires only 1/10 of the zombies required in the other achievement, strangely enough, this achievement also has a larger reward.

• Play the game for a long enough time and you'll eventually get this one.
• A quicker way to do this Achievement is to play through a finale as normal and then when the rescue vehicle arrives stay and hold out until you die while killing as many Infected as you can. It's best doing it in a glitches spot where the Infected cannot get you such as the "Jesus room," which is still unpatched on the 360 version.
• This is a reference to the game Dead Rising, in which if you kill 53,594 zombies, it grants the "Zombie Genocider" achievement; Frank West, the player, has killed, down to a man, the entire population of Willamette. In order to outdo Dead Rising, Valve included this achievement and added one more to the kill count. The word is also a pun: the suffix "er" usually indicates something that is directly better than the previous (which is the ending of Genocider, although it's a different meaning in that term) while "est" indicates something that is the best. This Achievement is literally a "we are the best" statement.
• This number is referenced in a set of safe house graffiti in the No Mercy campaign, with different inscriptions claiming 40, 50, 120 and finally "53,595!!!" zombie kills. This one in particular is underscored by the declaration: "LIES!!!"
• Any kills done in split screen by a guest also adds to your kill count.
• This achievement was later referenced by the game Prototype, which requires the player to kill 53,596 Infected in order to obtain the "Trail of Corpses" achievement.
• In the Crash Course DLC, the achievement, 'The Littlest Genocide' also references this achievement, but with only 1/10 of the zombies.

• This is down mostly to the eventual lucky opportunity of being a Survivor using their melee attack to get you off a Survivor. You then need to get away without being killed. It works the best to wait for the Survivors to get separated; and then pounce on the lone one. As soon as they're dead, flee to avoid the other Survivors. The next time you pounce, you will get the achievement.
• You can also pounce on a Survivor in a group and hope to be punted off without being shot to death afterward. Then simply step back and pounce again.

• Getting a 25 can sometimes prove difficult, however sticking to high places is the best place. Remember that the Hunter arks in flight, so aim a little higher.
• This is a reference to the song Jumpin' Jack Flash by The Rolling Stones.

• The strategy is largely the same as double jump. You need to hold on to the Survivors long enough to cause damage.
• Stay on the rooftops. When someone is freed, back away from the roof edges to avoid gunfire. When the Survivors forget about you, constrict someone again.
• Chain smoking is smoking many cigarettes in succession, sometimes used specifically to mean using a dying cigarette to light a new one.

• Spawn behind the group and nab the Survivor in the back. Eventually you will get lucky enough to have the Survivors not notice, and you will survive long enough to get the achievement.
• Another way to get this achievement is if you drag a Survivor off a rooftop and he/she falls 100 feet. (easily done on the first level of No Mercy if you're quick enough)
• This can also easily be done by hiding among the trees in the first section of Blood Harvest, as you will rarely be spotted before you grab a Survivor and long distances are abundant.
• Big Drag is a play on words, referring to both the act of dragging a survivor, and taking a drag from a cigerette.

• Once a Boomer pukes on any Survivor, simply pull him with your tongue and the achievement will unlock.

• Simply play versus long enough and you're bound to get it.
• This achievement is a reference to the vehicle used in Land of the Dead by the mercenaries in the film. The vehicle's name was Dead Reckoning.
• A way to get the Achievement faster is when you get the chance to play as a Tank try and bash out as much from the Survivors and try and incapacitate them and then go for the rest of them and you should get 25 damage per punch as a Tank.

• Exploding on Survivors doesn't count. You must vomit on all 4 in one attack.
• Barf bag is another term for airsickness bag, a bag to collect vomit from people who get motion sickness.
• Vomit on all four of the Survivors at once. If even one is missed, you will not get the achievement. One of the most important things to remember when trying to get this achievement is "location, location, location". If the Survivors are huddled into one corner, go for it.
• Remember that if the Survivors are huddled too close, it will be tricky to hit the ones at the back of the group. Another tactic to avoid this situation is to look for an opportunity to ambush the Survivors when they are very slightly spread out, and spraying them all with bile in one horizontal motion.

• This is down to your individual tactics. You only have to incapacitate the four Survivors to get the achievement.
• Getting hit by a car instantly incapacitates a Survivor. If you can knock a car down a narrow hallway as all four Survivors are together, you can knock them all out in a single hit.
• This achievement tends to be easier to get in the beginning of a campaign when the Survivors have only the pump shotgun and submachine gun, as they do much less damage to a Tank than the auto-shotgun, assault rifle, or hunting rifle that tend to be found later in a campaign, but obviously this depends on what items are spawned by the AI Director and in what location. Just keep playing Versus, hope you get to become a Tank early in the game, and just keep attacking and you can earn this achievement.
• Although it's something that can be frowned upon normally, you can "steal" kills from team mates who have constricted or pounced players that are not yet incapacitated.
• Note that as the Tank it is you that needs to incapacitate each survivor to earn this achievement, if you incapacitate three survivors and a team mate incapacitates the last one you do NOT receive this achievement.

• This is down to your individual tactics.
• It is possible that pouncing a Survivor as Hunter just as they close the door can earn you this achievement.
• One of the easiest ways to do this is to wait outside the door after someone decided to go Rambo and run to the safe room without their teammates.

• This achievement is cumulative, so it is not all in one game. The best place to get this will be the parking lot with the alarmed cars.
• Dumpsters also affect the progress of this achievement.

• Simply incapacitate all the (remaining) Survivors after the escape vehicle appears in the Crash Course campaign. Probably easiest by being the Tank that spawns when the vehicle has arrived.

• To earn this achievement you or your team 'simply' need to incapacitate 3 survivors within 5 seconds of each other. The easiest way of achieving this is having a Tank incapacitate multiple survivors in one go by hitting a car/forklift/object at them.
• You must be one of the 3 Infected players incapacitating a Survivor player to be awarded the achievement.

• This is unlocked by being vomited on by a player-controlled Boomer who already has this achievement, while in Versus
• It is unknown why this Achievement is not on the Xbox 360 version of the game.
  • It is possible that this achievement is not on the Xbox 360 because Valve players were limited to the PC version.
• This achievement originated from Boomers controlled by Valve developer players.

• This can be acquired by completing the campaign on any difficulty.
• "Price Chopper" refers to the setting of the campaign (in a mall) and the use of newly introduced close combat weapons.

• This can be acquired by completing the campaign on any difficulty.
• "Midnight Rider" refers to the finale of the campaign, in which you must summon the rescue vehicle by using the partially set up stage for a Midnight Riders concert.
• Could refer to the song 'Midnight Rider' by the Allman Brothers Band

• This can be acquired by completing the campaign on any difficulty.
• Cajun refers to both an ethnic group and cuisine that are common in the area in which the game is set.

• This can be acquired by completing the campaign on any difficulty.
• This campaign features torrential rain and extreme weather resulting from an approaching hurricane.

• This can be acquired by completing the campaign on any difficulty.
• The campaign finale involves the survivors crossing a two-level bridge being bombed by F-18 Hornets.

• Refers to the play The Glass Menagerie by Tennessee Williams which is set in New Orleans

• This is an reference to Charles Dicken's novel Great Expectations.