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.
Spread cheer by helping a free holiday player survive a campaign.
Plays games with free weekend players and helps them survive a campaign.
Survive all campaigns on Expert.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Survive a campaign on Expert skill with Realism mode enabled.
As the Charger, bowl through the entire enemy team in a single charge.
Revive 10 dead Survivors with the defibrillator.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Defend yourself at the crashed airliner without taking damage.
Cross the bridge finale in less than three minutes.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
Survive the Hard Rain campaign.
Collect 100 gas cans in Scavenge.
Cause 25 gas can drops as a Special Infected.
As the Spitter, spit on a Survivor being choked by a Smoker.
Collect 15 gas cans in a single Scavenge round.
Stop the enemy team from collecting any gas cans during a Scavenge round.
Kill a Charger with a melee weapon while they are charging.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
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.
As the Jockey, ride the Survivors twice in a single life.
Win a game of Scavenge.
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
Make a Survivor drop a gas can during overtime.
As the Spitter, hit every Survivor with a single acid patch.
Kill 10 swampy Mudmen while they are in the water.
Use every melee weapon to kill Common Infected.
In a Survival round, get a medal only using melee weapons.
Kill 15 Infected with a single grenade launcher blast.
Ignite 50 Common Infected with incendiary ammo.
Rescue Gnome Chompski from the Carnival.
Survive the Dead Center campaign.
Finish a campaign using only melee weapons.
Kill 100 Common Infected with the chainsaw.
Kill a Tank with melee weapons.
As the Charger, grab a Survivor and carry them over 80 feet.
Prove you are stronger than Moustachio.
Prove you are faster than Moustachio.
Navigate the sugar mill and reach the safe room without killing any Witches.
Kill one of each Uncommon Infected.
Decapitate 200 Infected with a melee weapon.
Use a bile bomb on a Tank.
Survive the Dark Carnival campaign.
Survive the Swamp Fever campaign.
Honk the noses of 10 Clowns.
Kill a Spitter before she is able to spit.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Deploy an ammo upgrade and have your team use it.
Survive the Parish campaign.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Play 6 Mutations.
Collect 10 items dropped by a Fallen Survivor.
Survive The Passing Campaign.
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.
Kill a Tank only with damage from the original Survivors.
Open 5 foot lockers.
Play 5 full games of Scavenge on The Port.
As a Special Infected, incap someone who is trying to sacrifice themselves.
Have all 3 generators running at once in "The Sacrifice" finale.
Complete "The Sacrifice".
Have Bill sacrifice himself for the team.
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!
Survive for 30 minutes on any official survival map.
Earn a silver medal on every official survival map.
Earn a gold medal on every official survival map.
Earn a bronze medal on every official survival map
Kill the Witch bride with a single shotgun blast on expert difficulty.
Escape Liberty Mall's Atrium before the first Tank appears
Complete The Last Stand campaign in 13 minutes or less, without any Survivors dying.
On the concert finale, survive until the helicopter arrives without leaving the stage
Kill a Witch using only a sharp melee weapon, without anyone getting incapacitated or killed.
Rescue three Survivors from a single rescue closet.
Discover the hidden room in the Last Stand campaign
Destroy 20 gascans as the Spitter.
Earn a gold medal on any official survival map.
Survive for 10 minutes on any official map in Versus Survival.
Kill 20 Jockeys with the shovel or pitchfork.
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.
As the Hunter, land a 25 damage pounce.
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.
Survive The Last Stand campaign on Expert Realism.
With a sharp melee weapon, cut a Smoker's tongue before he ensnares you.
Kill a pouncing Hunter with a shotgun.
Revive an incapacitated teammate while a Tank is nearby.
Destroy a Tank's rock in mid-air.
Find the golden crowbars hidden in the Left 4 Dead 1 survival maps.
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space.