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