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