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