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