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.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
Spread cheer by helping a free holiday player survive a campaign.
Survive a campaign on Expert skill with Realism mode enabled.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Kill a Charger with a melee weapon while they are charging.
Kill a Tank with melee weapons.
Cause 25 gas can drops as a Special Infected.
Collect 100 gas cans in Scavenge.
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.
In a Survival round, get a medal only using melee weapons.
Survive all campaigns on Expert.
Revive 10 dead Survivors with the defibrillator.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Cross the bridge finale in less than three minutes.
Navigate the sugar mill and reach the safe room without killing any Witches.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
Kill 15 Infected with a single grenade launcher blast.
Defend yourself at the crashed airliner without taking damage.
Kill 10 swampy Mudmen while they are in the water.
Collect 15 gas cans in a single Scavenge round.
As the Charger, grab a Survivor and carry them over 80 feet.
Honk the noses of 10 Clowns.
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.
As the Jockey, ride a Survivor for more than 12 seconds.
As the Jockey, ride a Survivor and steer them into a Spitter's acid patch.
Survive the Parish campaign.
Use every melee weapon to kill Common Infected.
Finish a campaign using only melee weapons.
As the Jockey, ride the Survivors twice in a single life.
As the Charger, bowl through the entire enemy team in a single charge.
Survive the Hard Rain campaign.
Kill one of each Uncommon Infected.
Survive the Swamp Fever campaign.
Ignite 50 Common Infected with incendiary ammo.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
Prove you are faster than Moustachio.
Rescue Gnome Chompski from the Carnival.
Decapitate 200 Infected with a melee weapon.
Survive the Dark Carnival campaign.
Prove you are stronger than Moustachio.
Use a bile bomb on a Tank.
Kill 100 Common Infected with the chainsaw.
Survive the Dead Center campaign.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Deploy an ammo upgrade and have your team use it.
Kill a Spitter before she is able to spit.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Play 6 Mutations.
Play 5 full games of Scavenge on The Port.
Kill a Tank only with damage from the original Survivors.
Using the M60, kill 25 infected without letting go of the trigger.
Collect 10 items dropped by a Fallen Survivor.
Knock off the heads of 18 infected with the golf club.
Survive The Passing Campaign.
Play the new Midnight Riders song on a jukebox.
Open 5 foot lockers.
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.
Survive The Last Stand campaign on Expert Realism.
Earn a gold medal on every official survival map.
Earn a silver medal on every official survival map.
Kill 53,599 infected. You made sure the dead won't rise anymore!
Survive for 30 minutes on any official survival map.
Survive for 10 minutes on any official map in Versus Survival.
Earn a bronze medal on every official survival map
Destroy 20 gascans as the Spitter.
Rescue three Survivors from a single rescue closet.
Kill 20 Jockeys with the shovel or pitchfork.
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.
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
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.
Revive an incapacitated teammate while a Tank is nearby.
As the Hunter, land a 25 damage pounce.
As the Boomer, vomit on a Survivor without having direct line of sight with them.
Instantly kill a Survivor as the Charger.
Destroy a Tank's rock in mid-air.
Earn a gold medal on any official survival map.
Earn a silver medal on any official survival map.
With a sharp melee weapon, cut a Smoker's tongue before he ensnares you.
Complete The Last Stand campaign in 13 minutes or less, without any Survivors dying.
Kill a pouncing Hunter with a shotgun.
Discover the hidden room in the Last Stand campaign
Survive The Last Stand campaign on any difficulty.
Earn a bronze medal on any official Survival map.
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space.