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.
Kill 53,600 Ridden over your career.
Win a game in Swarm Mode.
Complete Act 4 on Nightmare difficulty.
Complete all Act 3 maps on Nightmare difficulty.
Complete all Act 2 maps on Nightmare difficulty.
Complete all Act 1 maps on Nightmare difficulty.
Defend the jukebox in Bar Room Blitz without it breaking.
Kill a Monstrous Breaker after removing all of its armor.
Complete Act 4 on Veteran difficulty or higher.
Complete all Act 3 maps on Veteran difficulty or higher.
Find the secret in Plan B.
Complete a mission with each of the original Cleaners.
Find the secret in The Armory.
Find the secret in The Abomination.
Find the secret in Remnants.
Find the secret in Job 10:22.
Kill 10 Ridden with Bob's Arm.
Find the secret in The Dark Before the Dawn.
Find the secret in Search & Rescue.
Make a Breaker hurt itself.
Complete a map without any players on the team killing a single Ridden.
Complete all Act 2 maps on Veteran difficulty or higher.
Complete all Act 1 maps on Veteran difficulty or higher.
Kill an Ogre with the Howitzer.
Drop some ammo for a teammate.
Play 25 cards in a single match.
Find the secret in The Devil's Return.
Safely descend the ladder in the construction zone in Resurgence.
Complete Act 4 on Recruit difficulty or higher.
Heal a teammate.
Complete Remnants.
Complete all Act 3 maps on Recruit difficulty or higher.
Complete Dr. Rogers' Neighborhood.
Find the secret in Dr. Rogers' Neighborhood.
Complete Job 10:22.
Complete all Act 2 maps on Recruit difficulty or higher.
Complete Plan B.
Kill a Snitch without it alerting the horde.
Complete The Armory.
Complete all Act 1 maps on Recruit difficulty or higher.
Complete Blue Dog Hollow.
Find the secret in Blue Dog Hollow.
Complete The Dark Before The Dawn.
Complete Search & Rescue.
Spend your first Supply Point.
Kill 15 enemies while downed.
Rescue a teammate from a cocoon.
Kill at least one of each non-boss Mutation.
Complete The Devil's Return.
Complete a level while getting at least 50 kills with melee weapons.
Revive a fallen 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.
Good luck out there, you're gunna need it.
Form a party in Fort Hope.
Find the Secret in Brood Lair.
Complete All Ridden Hives.
Find the Secret in The Cut.
Find the Secret in The Nursery.
Find the Secret in Blood Stream.
Find the Secret in 300 Below.
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 Sunken Passages.
Complete all Act 6 maps on Nightmare difficulty or higher.
Defeat The Harbinger without using the LAW.
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.
Play Trial of the Worm for the first time.
Complete all Act 6 maps on Recruit difficulty or higher.
Complete all Act 6 maps on Veteran difficulty or higher.
Land a final blow on a Boss Mutation with the LAW.
Blow up a Food Item with the LAW.
Find the Secret in Act 6.
Kill all variants of the Sentinel.
Complete all Act 6 maps on No Hope difficulty.