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