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.
Complete Act 4 on Veteran difficulty or higher.
Complete all Act 2 maps on Veteran difficulty or higher.
Complete Act 4 on Recruit difficulty or higher.
Complete a mission with each of the original Cleaners.
Complete Remnants.
Complete all Act 3 maps on Recruit difficulty or higher.
Find the secret in Remnants.
Complete Dr. Rogers' Neighborhood.
Complete Job 10:22.
Complete all Act 2 maps on Recruit difficulty or higher.
Kill 15 enemies while downed.
Drop some ammo for a teammate.
Complete Plan B.
Complete The Armory.
Kill 10 Ridden with Bob's Arm.
Make a Breaker hurt itself.
Kill a Snitch without it alerting the horde.
Complete Blue Dog Hollow.
Complete Search & Rescue.
Complete The Dark Before The Dawn.
Defend the jukebox in Bar Room Blitz without it breaking.
Play 25 cards in a single match.
Kill at least one of each non-boss Mutation.
Complete The Devil's Return.
Rescue a teammate from a cocoon.
Complete a level while getting at least 50 kills with melee weapons.
Revive a fallen teammate.
Heal a teammate.
Form a party in Fort Hope.
Complete a map without ever triggering a horde from Reekers, Birds, Snitches, or alarms.
Spend your first Supply Point.
Complete a mission without any players being incapacitated or killed.
Good luck out there, you're gunna need it.
Complete all Act 1 maps on Recruit difficulty or higher.
Complete all Act 1 maps on Veteran difficulty or higher.
Complete all Act 1 maps on Nightmare difficulty.
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 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.
Complete a map without any players on the team killing a single Ridden.
Safely descend the ladder in the construction zone in Resurgence.
Win a game in Swarm Mode.
Find the secret in The Devil's Return.
Find the secret in Search & Rescue.
Find the secret in The Dark Before the Dawn.
Find the secret in Blue Dog Hollow.
Find the secret in The Armory.
Find the secret in Plan B.
Find the secret in Job 10:22.
Find the secret in Dr. Rogers' Neighborhood.
Find the secret in The Abomination.
Kill 10 Ridden with a Skull Totem.
Earn some Skull Totems.
Kill each of the Warped Ridden
Get a kill with a Legendary Weapon.
Complete All Ridden Hives.
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 6 maps on Veteran difficulty or higher.
Complete all Act 6 maps on Recruit difficulty or higher.
Land a final blow on a Boss Mutation with the LAW.
Play Trial of the Worm for the first time.
Kill all variants of the Sentinel.
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.
Set an enemy on fire with the Flamethrower, while also being on fire.
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.