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