Full list of all 65 Left 4 Dead 2 achievements worth 1,500 gamerscore. It takes around 20-25 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 15 achievements worth 500 Gamerscore.
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.
Kill a Tank with melee weapons.
Revive 10 dead Survivors with the defibrillator.
Rescue Gnome Chompski from the Carnival.
Cause 25 gas can drops as a Special Infected.
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
Collect 100 gas cans in Scavenge.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.
Ignite 50 Common Infected with incendiary ammo.
As the Charger, grab a Survivor and carry them over 80 feet.
Kill a Charger with a melee weapon while they are charging.
Cross the bridge finale in less than three minutes.
Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.
Finish a campaign using only melee weapons.
In a Survival round, get a medal only using melee weapons.
Collect 15 gas cans in a single Scavenge round.
Make a Survivor drop a gas can during overtime.
As the Jockey, ride a Survivor for more than 12 seconds.
As the Charger, bowl through the entire enemy team in a single charge.
Win a game of Scavenge.
As the Spitter, hit every Survivor with a single acid patch.
Stop the enemy team from collecting any gas cans during a Scavenge round.
Prove you are stronger than Moustachio.
Prove you are faster than Moustachio.
Kill a Jockey within 2 seconds of it jumping on a Survivor.
Defend yourself at the crashed airliner without taking damage.
Use every melee weapon to kill Common Infected.
Kill 10 swampy Mudmen while they are in the water.
Using a Molotov, burn a Clown leading at least 10 Common Infected.
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.
Survive the Parish campaign.
Kill a Spitter before she is able to spit.
Survive the Hard Rain campaign.
Kill one of each Uncommon Infected.
Survive the Swamp Fever campaign.
Survive the Dark Carnival campaign.
Honk the noses of 10 Clowns.
Kill 100 Common Infected with the chainsaw.
Kill 15 Infected with a single grenade launcher blast.
Use a bile bomb on a Tank.
Deploy an ammo upgrade and have your team use it.
Survive the Dead Center campaign.
Decapitate 200 Infected with a melee weapon.
Survive all campaigns on Expert.
Survive a campaign on Expert skill with Realism mode enabled.
In a Versus round, leave the saferoom to defibrillate a dead teammate.
Form a team and beat an enemy team in 4v4 Versus or Scavenge.
As the Spitter, spit on a Survivor being choked by a Smoker.
Play 6 Mutations.
As the Charger, grab a Survivor and crash them through 8 chairs at the wedding.
Kill a Tank only with damage from the original Survivors.
Collect 10 items dropped by a Fallen Survivor.
Using the M60, kill 25 infected without letting go of the trigger.
Open 5 foot lockers.
Survive The Passing Campaign.
Knock off the heads of 18 infected with the golf club.
Play 5 full games of Scavenge on The Port.
Play the new Midnight Riders song on a jukebox.
As a Special Infected, incap someone who is trying to sacrifice themselves.
Have all 3 generators running at once in "The Sacrifice" finale.
Have Bill sacrifice himself for the team.
Complete "The Sacrifice".
Kill a Special Infected with an exploding barrel.