Full list of all 101 Left 4 Dead 2 achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 52 achievements, and there are 7 DLC packs containing 49 achievements.
Plays games with free weekend players and helps them survive a campaign.
Spread cheer by helping a free holiday player survive a campaign.
Cause 25 gas can drops as a Special Infected.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Survive all campaigns on Expert.
Survive the Parish campaign.
Collect 100 gas cans in Scavenge.
As the Spitter, spit on a Survivor being choked by a Smoker.
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
As the Charger, grab a Survivor and carry them over 80 feet.
Make a Survivor drop a gas can during overtime.
Survive the Hard Rain campaign.
Survive a campaign on Expert skill with Realism mode enabled.
Navigate the sugar mill and reach the safe room without killing any Witches.
Finish a campaign using only melee weapons.
As the Charger, bowl through the entire enemy team in a single charge.
Collect 15 gas cans in a single Scavenge round.
In a Survival round, get a medal only using melee weapons.
Prove you are faster than Moustachio.
Prove you are stronger than Moustachio.
Rescue Gnome Chompski from the Carnival.
Kill 15 Infected with a single grenade launcher blast.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
Honk the noses of 10 Clowns.
Defend yourself at the crashed airliner without taking damage.
Kill 10 swampy Mudmen while they are in the water.
Kill a Charger with a melee weapon while they are charging.
Revive 10 dead Survivors with the defibrillator.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Cross the bridge finale in less than three minutes.
Decapitate 200 Infected with a melee weapon.
Kill a Tank with melee weapons.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Ignite 50 Common Infected with incendiary ammo.
Use every melee weapon to kill Common Infected.
Kill 100 Common Infected with the chainsaw.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Win a game of Scavenge.
Stop the enemy team from collecting any gas cans during a Scavenge round.
Use a bile bomb on a Tank.
Survive the Swamp Fever campaign.
Survive the Dark Carnival campaign.
Kill one of each Uncommon Infected.
Deploy an ammo upgrade and have your team use it.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Survive the Dead Center campaign.
Kill a Spitter before she is able to spit.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
As the Jockey, ride the Survivors twice in a single life.
As the Jockey, ride a Survivor for more than 12 seconds.
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
As the Spitter, hit every Survivor with a single acid patch.
Play 5 full games of Scavenge on The Port.
Play 6 Mutations.
Collect 10 items dropped by a Fallen Survivor.
Open 5 foot lockers.
Using the M60, kill 25 infected without letting go of the trigger.
Knock off the heads of 18 infected with the golf club.
Play the new Midnight Riders song on a jukebox.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Survive The Passing Campaign.
Kill a Tank only with damage from the original Survivors.
Complete "The Sacrifice".
Have all 3 generators running at once in "The Sacrifice" finale.
Have Bill sacrifice himself for the team.
As a Special Infected, incap someone who is trying to sacrifice themselves.
Kill a Special Infected with an exploding barrel.
Survive the Cold Stream campaign on any difficulty.
Play a Versus game on Dead Air from start to finish.
Collect three gifts dropped by Special Infected in Versus Mode.
Survive for 10 minutes on any official map in Versus Survival.
Destroy 20 gascans as the Spitter.
As the Hunter, land a 25 damage pounce.
Survive The Last Stand campaign on Expert Realism.
On the concert finale, survive until the helicopter arrives without leaving the stage
Kill 20 Jockeys with the shovel or pitchfork.
With a sharp melee weapon, cut a Smoker's tongue before he ensnares you.
Kill a Witch using only a sharp melee weapon, without anyone getting incapacitated or killed.
Kill the Witch bride with a single shotgun blast on expert difficulty.
Rescue three Survivors from a single rescue closet.
Earn a gold medal on every official survival map.
Earn a silver medal on every official survival map.
Earn a bronze medal on every official survival map
Kill 53,599 infected. You made sure the dead won't rise anymore!
Complete The Last Stand campaign in 13 minutes or less, without any Survivors dying.
Instantly kill a Survivor as the Charger.
As the Spitter, spit on a Survivor who is pinned by a Hunter.
As the Spitter, spit on a Survivor who is pinned by a Charger.
As the Boomer, vomit on a Survivor without having direct line of sight with them.
Escape Liberty Mall's Atrium before the first Tank appears
Kill a pouncing Hunter with a shotgun.
Destroy a Tank's rock in mid-air.
Revive an incapacitated teammate while a Tank is nearby.
Find the golden crowbars hidden in the Left 4 Dead 1 survival maps.
Survive for 30 minutes on any official survival map.
Earn a gold medal on any official survival map.
Earn a silver medal on any official survival map.
Earn a bronze medal on any official Survival map.
Survive The Last Stand campaign on any difficulty.
Discover the hidden room in the Last Stand campaign
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space.