Full list of all 93 Back 4 Blood achievements. It takes around 120-150 hours to unlock all of the achievements in the base game on Windows.
The base game contains 55 achievements, and there are 3 DLC packs containing 38 achievements.
Find the secret in The Abomination.
Find the secret in Remnants.
Complete a mission with each of the original Cleaners.
Complete a map without any players on the team killing a single Ridden.
Find the secret in Dr. Rogers' Neighborhood.
Find the secret in Blue Dog Hollow.
Find the secret in Search & Rescue.
Find the secret in The Devil's Return.
Complete Act 4 on Nightmare difficulty.
Complete all Act 3 maps on Nightmare difficulty.
Complete all Act 2 maps on Nightmare difficulty.
Find the secret in Job 10:22.
Defend the jukebox in Bar Room Blitz without it breaking.
Find the secret in Plan B.
Find the secret in The Armory.
Form a party in Fort Hope.
Complete all Act 1 maps on Nightmare difficulty.
Kill 15 enemies while downed.
Complete Act 4 on Recruit difficulty or higher.
Complete Act 4 on Veteran difficulty or higher.
Complete Remnants.
Complete all Act 3 maps on Recruit difficulty or higher.
Complete all Act 3 maps on Veteran difficulty or higher.
Kill a Monstrous Breaker after removing all of its armor.
Complete Dr. Rogers' Neighborhood.
Drop some ammo for a teammate.
Complete Job 10:22.
Complete all Act 2 maps on Recruit difficulty or higher.
Complete all Act 2 maps on Veteran difficulty or higher.
Complete Plan B.
Complete The Armory.
Kill 10 Ridden with Bob's Arm.
Kill an Ogre with the Howitzer.
Revive a fallen teammate.
Heal a teammate.
Safely descend the ladder in the construction zone in Resurgence.
Spend your first Supply Point.
Complete Blue Dog Hollow.
Complete all Act 1 maps on Recruit difficulty or higher.
Complete all Act 1 maps on Veteran difficulty or higher.
Complete The Dark Before The Dawn.
Find the secret in The Dark Before the Dawn.
Complete Search & Rescue.
Kill at least one of each non-boss Mutation.
Rescue a teammate from a cocoon.
Make a Breaker hurt itself.
Play 25 cards in a single match.
Complete The Devil's Return.
Kill a Snitch without it alerting the horde.
Complete a mission without any players being incapacitated or killed.
Complete a level while getting at least 50 kills with melee weapons.
Complete a map without ever triggering a horde from Reekers, Birds, Snitches, or alarms.
Good luck out there, you're gunna need it.
Kill 53,600 Ridden over your career.
Win a game in Swarm Mode.
Find the Secret in The Nursery.
Find the Secret in Brood Lair.
Find the Secret in 300 Below.
Find the Secret in Blood Stream.
Complete All Ridden Hives.
Find the Secret in Sunken Passages.
Find the Secret in Caustic Cesspool.
Kill each of the Warped Ridden
Get a kill with a Legendary Weapon.
Earn some Skull Totems.
Kill 10 Ridden with a Skull Totem.
Find the Secret in The Cut.
Kill all variants of the Sentinel.
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 Flamethrower, while also being on fire.
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.
Defeat The Harbinger without using the LAW.
Blow up a Food Item with the LAW.