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