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.
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
Collect 100 gas cans in Scavenge.
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
As the Charger, bowl through the entire enemy team in a single charge.
As the Jockey, ride the Survivors twice in a single life.
As the Spitter, spit on a Survivor being choked by a Smoker.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Survive all campaigns on Expert.
Survive the Parish campaign.
Survive the Hard Rain campaign.
Survive the Swamp Fever campaign.
As the Spitter, hit every Survivor with a single acid patch.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Stop the enemy team from collecting any gas cans during a Scavenge round.
Make a Survivor drop a gas can during overtime.
As the Charger, grab a Survivor and carry them over 80 feet.
As the Jockey, ride a Survivor for more than 12 seconds.
Navigate the sugar mill and reach the safe room without killing any Witches.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
Cross the bridge finale in less than three minutes.
Defend yourself at the crashed airliner without taking damage.
Win a game of Scavenge.
Collect 15 gas cans in a single Scavenge round.
In a Survival round, get a medal only using melee weapons.
Rescue Gnome Chompski from the Carnival.
Prove you are faster than Moustachio.
Prove you are stronger than Moustachio.
Kill a Charger with a melee weapon while they are charging.
Decapitate 200 Infected with a melee weapon.
Finish a campaign using only melee weapons.
Kill one of each Uncommon Infected.
Survive a campaign on Expert skill with Realism mode enabled.
Survive the Dark Carnival campaign.
Deploy an ammo upgrade and have your team use it.
Use every melee weapon to kill Common Infected.
Ignite 50 Common Infected with incendiary ammo.
Revive 10 dead Survivors with the defibrillator.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
Kill a Tank with melee weapons.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Kill 10 swampy Mudmen while they are in the water.
Kill 15 Infected with a single grenade launcher blast.
Honk the noses of 10 Clowns.
Kill 100 Common Infected with the chainsaw.
Survive the Dead Center campaign.
Kill a Spitter before she is able to spit.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Use a bile bomb on a Tank.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Play 5 full games of Scavenge on The Port.
Collect 10 items dropped by a Fallen Survivor.
Play 6 Mutations.
Kill a Tank only with damage from the original Survivors.
Survive The Passing Campaign.
Play the new Midnight Riders song on a jukebox.
Knock off the heads of 18 infected with the golf club.
Open 5 foot lockers.
Using the M60, kill 25 infected without letting go of the trigger.
Have all 3 generators running at once in "The Sacrifice" finale.
As a Special Infected, incap someone who is trying to sacrifice themselves.
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!
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
Destroy 20 gascans as the Spitter.
As the Spitter, spit on a Survivor who is pinned by a Charger.
Instantly kill a Survivor as the Charger.
As the Hunter, land a 25 damage pounce.
As the Boomer, vomit on a Survivor without having direct line of sight with them.
Survive for 10 minutes on any official map in Versus Survival.
Escape Liberty Mall's Atrium before the first Tank appears
Survive for 30 minutes on any official survival map.
Kill the Witch bride with a single shotgun blast on expert difficulty.
Kill 20 Jockeys with the shovel or pitchfork.
On the concert finale, survive until the helicopter arrives without leaving the stage
Destroy a Tank's rock in mid-air.
With a sharp melee weapon, cut a Smoker's tongue before he ensnares you.
As the Spitter, spit on a Survivor who is pinned by a Hunter.
Earn a gold medal on any official survival map.
Earn a silver medal on any official survival map.
Kill a Witch using only a sharp melee weapon, without anyone getting incapacitated or killed.
Survive The Last Stand campaign on Expert Realism.
Revive an incapacitated teammate while a Tank is nearby.
Rescue three Survivors from a single rescue closet.
Discover the hidden room in the Last Stand campaign
Find the golden crowbars hidden in the Left 4 Dead 1 survival maps.
Earn a bronze medal on any official Survival map.
Complete The Last Stand campaign in 13 minutes or less, without any Survivors dying.
Survive The Last Stand campaign on any difficulty.
Kill a pouncing Hunter with a shotgun.
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space.