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