Full list of all 93 Back 4 Blood achievements worth 1,380 gamerscore. It takes around 150-200 hours to unlock all of the achievements in the base game.
The base game contains 55 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 38 achievements worth 380 Gamerscore.
Win a game in Swarm Mode.
Defend the jukebox in Bar Room Blitz without it breaking.
Complete a mission with each of the original Cleaners.
Find the secret in "The Armory".
Complete Act 4 on Recruit difficulty or higher.
Find the secret in "The Abomination".
Complete all Act 3 maps on Recruit difficulty or higher.
Complete Remnants.
Kill a Snitch without it alerting the horde.
Play 25 cards in a single match.
Find the secret in "Remnants".
Complete Dr. Rogers' Neighborhood.
Find the secret in "Dr. Rogers' Neighborhood".
Complete all Act 2 maps on Recruit difficulty or higher.
Complete Job 10:22.
Find the secret in "Job 10:22".
Complete Plan B.
Find the secret in "Plan B".
Complete The Armory.
Kill 10 Ridden with Bob's Arm.
Complete all Act 1 maps on Recruit difficulty or higher.
Complete Blue Dog Hollow.
Find the secret in "The Dark Before the Dawn".
Find the secret in "Search & Rescue".
Find the secret in "The Devil's Return".
Complete a mission without any players being incapacitated or killed.
Complete a map without any players on the team killing a single Ridden.
Complete a level while getting at least 50 kills with melee weapons.
Kill at least one of each non-boss Mutation.
Find the secret in "Blue Dog Hollow".
Complete The Dark Before The Dawn.
Drop some ammo for a teammate.
Complete Search & Rescue.
Spend your first Supply Point.
Rescue a teammate from a cocoon.
Make a Breaker hurt itself.
Complete The Devil's Return.
Complete a map without ever triggering a horde from Reekers, Birds, Snitches, or alarms.
Kill 15 enemies while downed.
Heal a teammate.
Safely descend the ladder in the construction zone in Resurgence.
Revive a fallen teammate.
Good luck out there, you're gunna need it.
Form a party in Fort Hope.
Complete all Act 1 maps on Veteran difficulty or higher.
Complete all Act 1 maps on Nightmare difficulty.
Complete all Act 2 maps on Veteran difficulty or higher.
Complete all Act 2 maps on Nightmare difficulty.
Complete all Act 3 maps on Veteran difficulty or higher.
Complete all Act 3 maps on Nightmare difficulty.
Complete Act 4 on Veteran difficulty or higher.
Complete Act 4 on Nightmare difficulty.
Kill 53,600 Ridden over your career.
Kill a Monstrous Breaker after removing all of its armor.
Kill an Ogre with the Howitzer.
Kill each of the Warped Ridden.
Complete All Ridden Hives.
Get a kill with a Legendary Weapon.
Earn some Skull Totems.
Kill 10 Ridden with a Skull Totem.
Find the Secret in The Nursery.
Find the Secret in Sunken Passages.
Find the Secret in The Cut.
Find the Secret in Brood Lair.
Find the Secret in 300 Below.
Find the Secret in Blood Stream.
Find the Secret in Caustic Cesspool.
Complete all Act 5 maps on Recruit difficulty or higher.
Complete all Act 5 maps on Veteran difficulty or higher.
Complete all Act 5 maps on Nightmare difficulty or higher.
Complete all Act 5 maps on No Hope difficulty.
Find the Secret in Act 5.
Hit a Pusflinger with a Bait Jar.
Kill a Slasher with Iron Claws.
Kill a Sniper with a Sniper Rifle.
Kill a Crone with the Bow.
Use a Smoke Grenade to become hidden while at Critical Health.
Jump over a Cultist Bear Trap without triggering it.
Bring 11 Duffel Bags to Saferooms.
Have at least five different Food Buffs active at one time.
Complete all Act 6 maps on Recruit difficulty or higher.
Complete all Act 6 maps on Veteran difficulty or higher.
Complete all Act 6 maps on Nightmare difficulty or higher.
Complete all Act 6 maps on No Hope difficulty.
Find the Secret in Act 6.
Land a final blow on a Boss Mutation with the LAW.
Set an enemy on fire with the Flame Thrower, while also being on fire.
Kill all variants of the Sentinel.
Defeat The Harbinger without using the LAW.
Blow up a Food Item with the LAW.
Play Trial of the Worm for the first time.
Earn a score of at least 100,000 in Trial of the Worm.
Complete a map in Trial of the Worm with a total modifier of at least x20.