Obtaining achievements

Survivor Achievements
Difficulty : Easy

How - to : Just as the Survivor is grabbed by Smoker quickly melee the Survivor or shoot the Smoker

Difficulty : Easy

How - to : Aim for the heads of attacking infected (that you should be doing anyway) also when walking through quiet parts of the game try to headshot the infected that dont notice your there. Also, use the sniper rifle for more accurate headshots.

Difficulty : Easy

How - to : 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 will take constriction damage.

Difficulty : Medium

How - to : 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 combat shotgun and assault rifles. Try not to hit your teammates during the attack. You can also try throwing a pipe bomb. Note that 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.

Difficulty : Easy

How - to : You can fulfill this achievement either by throwing a pipe bomb or by blowing up explosives. This achievement should be attempted at finales or mini-finales, 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 pipebomb 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.

Difficulty : Easy

How - to : Watch your team mates backs when a horde is attacking (that you should be doing anyway).You can fulfill this achievement just by playing long enough.

Difficulty : Medium

How - to : Your health needs to be green to outrun the Tank. Try to be in an open space when faced with a Tank. (finales are good since there's usually a lot of space). If The Tank charges at you, backpedal 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 - long range weapon such as Assault rifle or Hunting rifle. Attacking the tank with Auto shotgun is dangerous, because The Tank has great speed and you must be in a close range to do proper damage The Tank.

Difficulty : Easy

How - to : You can free an constricted survivors by meleeing them or by killing The Smoker.

Difficulty : Easy

How - to : This is an easy achievement to get. Once a survivor dies, they will respeawn in a closet. This happens after 1 minute, and after the rest of the survivors move a certian distance from the dead body. Once the survivor respsawns, they will call out, once found open the closet to save them.

Difficulty : Easy

How - to : You can free pinned survivors by meleeing the Hunter or by shooting the Hunter. Watch out for friendly fire, though.

Difficulty : Easy

How - to : To set infected on fire, you must throw a Molotov cocktail or a pipe bomb at them. A Molotov is recommended becuase of its large area of effect and longer burn. A tactic that is useful is during a Panic Event, Crescendo Event, or a finale throw the molotov where the infected are coming from, or in a central area, and you should get this achievement. Note: This is a cumulative achievement.

Difficulty : Easy

How - to : In the start room of every 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. For any PC users with much less patience, the following commands may be inputted into console to make obtaining this achievement even easier.

sv_cheats 1; give molotov; z_spawn tank; sv_cheats 0

Difficulty : Easy to Medium

How - to : 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 rated Easy to Medium is due to a small luck factor that affects it due to the chances of another survivor being pounced or dragged being quite slim if you are in a group of good players. It happens often in versus, since the bosses will focus on your teammate while he's helping you.

Difficulty : Medium

How - to : Hunting rifles sound like your best bet to kill a witch in one headshot, however, this theory is very, very wrong. The key idea to keep in mind with killing a witch is to NOT LET HER SEE YOU! To do this, you must shut of all flashlights, get a auto or pump action shotgun, and sneak right up to her, as close a possilbe. She will most likely look over at you, and just as she does this, aim for her neck, and you're bound to get this achievement.

Difficulty : Easy

How - to : There are miniguns at each finale except for Blood Harvest, along with certian 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.

Difficulty: Medium to Hard

How - to : Best done on Death Toll's finale. Proceed on as normal and survive the rescue hordes. Make sure to have a Molotov with you. When the boat arrives, get the rest of your friends to board, but do not board it yourself yet; wait until you hear a Tank approaching. Once you see it, immediately throw a Molotov onto the small bridge on the pier, and wait for the Tank to catch fire. As soon as it catches fire, board the boat. By the end of the credits, you should have earned the achievement.

Infected Achievements
ALL 4 DEAD

Single-handedly incapacitate all four Survivors. (?G) Difficulty:Easy or Hard

How - to: This depends if the Survivors are aware of where you are. If they hear the pound, they will stay in a small room the whole time, or go out to look for you. You have to climb over them and attack them from the back or go full speed to knock them down. All you need to do is incapacitate all four of the Survivors so they can't help each other. If another Infected player attacks one, the achievement won't work.

BARF BAGGED

Vomit on all four Survivors. (?G) Difficulty:Easy or Hard

How - To: Vomit on all the Survivors when you get a chance. If you miss even one, you won't get the achievement.