Left 4 Dead/Achievements

Survivor Achievements

 * || Helping Hand || Revive 50 incapacitated Survivors. ||
 * || Field Medic || Heal 25 Survivors with a first aid kit. ||
 * || Pharm-assist || Give pain pills to 10 Survivors. ||
 * || My Bodyguard || Protect any Survivor from an attacking Infected 50 times. ||
 * || Dead Stop || Punch a Hunter while he is pouncing. ||
 * || Cr0wnd || Kill a Witch with a single headshot. ||
 * || Untouchables || No Survivor takes damage after contacting the rescue vehicle. ||
 * || Drag and Drop || Rescue a Survivor from a Smoker's tongue before he is injured. ||
 * || Blind Luck || You or another Survivor take no damage after being vomited on by a Boomer. ||
 * || Akimbo Assassin || Survive an entire campaign using only pistols. ||
 * || Hero Closet || Rescue a Survivor trapped in a closet. ||
 * || Hunter Punter || Shove a Hunter off a pinned and helpless Survivor. ||
 * || Tongue Twister || Free yourself from a Smoker who has grabbed you with his tongue. ||
 * || No Smoking Section || Kill 10 Smokers as they are pulling helpless survivors. ||
 * || 101 Cremations || Set 101 Infected on fire. ||
 * || Do Not Disturb || Sneak past all Witches in a campaign without disturbing one. ||
 * || Man vs Tank || Single-handedly kill a Tank. ||
 * || Tankbusters || Kill a Tank without it dealing any damage to a Survivor. ||
 * || Safety First || Play an entire campaign with no Survivors taking friendly fire damage. ||
 * || No-one Left Behind || Beat a campaign with all four Survivors. ||
 * || Unbreakable || Finish a campaign without ever being healed. ||
 * || Witch Hunter || Kill a Witch without any Survivor taking damage from her. ||
 * || Red Mist || Kill 1000 Infected with a mounted machine gun. ||
 * || Pyrotechnician || Blow up 20 Infected in a single explosion. ||
 * || Zombie Genocidist || Kill 53,595 Infected. ||
 * || Dead Giveaway || Heal a fellow Survivor when your health is below 10. ||
 * || Stand Tall || Survive a campaign without being incapacitated. ||
 * || Zombicidal Maniac || Survive any campaign on Expert. ||
 * || What Are You Trying to Prove? || Survive all campaigns on Expert. ||
 * || Nothing Special || Survive a campaign with no Survivors taking damage from Special Infected. ||
 * || Burn the Witch || Light a Witch with a molotov. ||
 * || Towering Inferno || Light a Tank with a molotov. ||
 * || Spinal Tap || Kill an Infected with a single blow from behind. ||
 * || Stomach Upset || All Survivors complete a campaign without being vomited on. ||
 * || Brain Salad || Make 100 headshot kills. ||
 * || Jump Shot || Headshot a Hunter while he's leaping. ||
 * || Mercy Killer || Survive the No Mercy campaign. ||
 * || Back 2 Help || Leave a safe room to save an incapped teammate and bring them back to safety. ||
 * || Toll Collector || Survive the Death Toll campaign. ||
 * || Dead Baron || Survive the Dead Air campaign. ||
 * || Grim Reaper || Survive the Blood Harvest campaign. ||
 * || Ground Cover || Save another Survivor from a Special Infected while on the ground. ||
 * || Clean Kill || Shove a Boomer and then kill him without him splashing on anyone. ||
 * || Outbreak || Catch a rare straing of infection, then pass it on to someone else. (PC Only) || N/A
 * }
 * || Pyrotechnician || Blow up 20 Infected in a single explosion. ||
 * || Zombie Genocidist || Kill 53,595 Infected. ||
 * || Dead Giveaway || Heal a fellow Survivor when your health is below 10. ||
 * || Stand Tall || Survive a campaign without being incapacitated. ||
 * || Zombicidal Maniac || Survive any campaign on Expert. ||
 * || What Are You Trying to Prove? || Survive all campaigns on Expert. ||
 * || Nothing Special || Survive a campaign with no Survivors taking damage from Special Infected. ||
 * || Burn the Witch || Light a Witch with a molotov. ||
 * || Towering Inferno || Light a Tank with a molotov. ||
 * || Spinal Tap || Kill an Infected with a single blow from behind. ||
 * || Stomach Upset || All Survivors complete a campaign without being vomited on. ||
 * || Brain Salad || Make 100 headshot kills. ||
 * || Jump Shot || Headshot a Hunter while he's leaping. ||
 * || Mercy Killer || Survive the No Mercy campaign. ||
 * || Back 2 Help || Leave a safe room to save an incapped teammate and bring them back to safety. ||
 * || Toll Collector || Survive the Death Toll campaign. ||
 * || Dead Baron || Survive the Dead Air campaign. ||
 * || Grim Reaper || Survive the Blood Harvest campaign. ||
 * || Ground Cover || Save another Survivor from a Special Infected while on the ground. ||
 * || Clean Kill || Shove a Boomer and then kill him without him splashing on anyone. ||
 * || Outbreak || Catch a rare straing of infection, then pass it on to someone else. (PC Only) || N/A
 * }
 * || Brain Salad || Make 100 headshot kills. ||
 * || Jump Shot || Headshot a Hunter while he's leaping. ||
 * || Mercy Killer || Survive the No Mercy campaign. ||
 * || Back 2 Help || Leave a safe room to save an incapped teammate and bring them back to safety. ||
 * || Toll Collector || Survive the Death Toll campaign. ||
 * || Dead Baron || Survive the Dead Air campaign. ||
 * || Grim Reaper || Survive the Blood Harvest campaign. ||
 * || Ground Cover || Save another Survivor from a Special Infected while on the ground. ||
 * || Clean Kill || Shove a Boomer and then kill him without him splashing on anyone. ||
 * || Outbreak || Catch a rare straing of infection, then pass it on to someone else. (PC Only) || N/A
 * }
 * || Dead Baron || Survive the Dead Air campaign. ||
 * || Grim Reaper || Survive the Blood Harvest campaign. ||
 * || Ground Cover || Save another Survivor from a Special Infected while on the ground. ||
 * || Clean Kill || Shove a Boomer and then kill him without him splashing on anyone. ||
 * || Outbreak || Catch a rare straing of infection, then pass it on to someone else. (PC Only) || N/A
 * }
 * || Clean Kill || Shove a Boomer and then kill him without him splashing on anyone. ||
 * || Outbreak || Catch a rare straing of infection, then pass it on to someone else. (PC Only) || N/A
 * }
 * }

Infected Achievements

 * || Big Drag || Drag a Survivor 100 feet with your tongue. ||
 * || Chain Smoker || Constrict two Survivors in one life as a Smoker. ||
 * || Barf Bagged || Cover four Survivors with Boomer bile at once. ||
 * || Double Jump || Pounce two different Survivors in one life as a Hunter. ||
 * || All 4 Dead || Kill all four Survivors in one life as a Tank. ||
 * || Dead Wreckoning || Dole out 5000 total Survivor damage as a Special Infected. ||
 * || Lamb to Slaughter || As an Infected, incap a Survivor who has entered and left a safe room. ||
 * }
 * || All 4 Dead || Kill all four Survivors in one life as a Tank. ||
 * || Dead Wreckoning || Dole out 5000 total Survivor damage as a Special Infected. ||
 * || Lamb to Slaughter || As an Infected, incap a Survivor who has entered and left a safe room. ||
 * }
 * || Lamb to Slaughter || As an Infected, incap a Survivor who has entered and left a safe room. ||
 * }