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 3 maps on Veteran difficulty or higher.
Kill an Ogre with the Howitzer.
Find the secret in Job 10:22.
Find the secret in The Armory.
Win a game in Swarm Mode.
Find the secret in Remnants.
Find the secret in Search & Rescue.
Kill a Monstrous Breaker after removing all of its armor.
Find the secret in The Devil's Return.
Complete a map without any players on the team killing a single Ridden.
Safely descend the ladder in the construction zone in Resurgence.
Defend the jukebox in Bar Room Blitz without it breaking.
Drop some ammo for a teammate.
Complete all Act 2 maps on Veteran difficulty or higher.
Complete all Act 1 maps on Veteran difficulty or higher.
Find the secret in The Dark Before the Dawn.
Complete a level while getting at least 50 kills with melee weapons.
Complete Act 4 on Recruit difficulty or higher.
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 15 enemies while downed.
Find the secret in Plan B.
Complete The Armory.
Kill 10 Ridden with Bob's Arm.
Complete Blue Dog Hollow.
Complete all Act 1 maps on Recruit difficulty or higher.
Make a Breaker hurt itself.
Spend your first Supply Point.
Find the secret in Blue Dog Hollow.
Complete The Dark Before The Dawn.
Complete Search & Rescue.
Kill a Snitch without it alerting the horde.
Revive a fallen teammate.
Heal a teammate.
Kill at least one of each non-boss Mutation.
Rescue a teammate from a cocoon.
Complete The Devil's Return.
Complete a mission without any players being incapacitated or killed.
Complete a map without ever triggering a horde from Reekers, Birds, Snitches, or alarms.
Play 25 cards in a single match.
Good luck out there, you're gunna need it.
Form a party in Fort Hope.
Complete all Act 1 maps on Nightmare difficulty.
Complete all Act 2 maps on Nightmare difficulty.
Complete all Act 3 maps on Nightmare difficulty.
Complete Act 4 on Nightmare difficulty.
Kill 53,600 Ridden over your career.
Complete a mission with each of the original Cleaners.
Find the secret in The Abomination.
Find the Secret in The Nursery.
Find the Secret in Caustic Cesspool.
Find the Secret in The Cut.
Find the Secret in Sunken Passages.
Complete All Ridden Hives.
Find the Secret in Blood Stream.
Find the Secret in Brood Lair.
Kill 10 Ridden with a Skull Totem.
Kill each of the Warped Ridden
Earn some Skull Totems.
Get a kill with a Legendary Weapon.
Find the Secret in 300 Below.
Blow up a Food Item with the LAW.
Land a final blow on a Boss Mutation with the LAW.
Defeat The Harbinger without using the LAW.
Complete all Act 6 maps on Recruit difficulty or higher.
Set an enemy on fire with the Flamethrower, while also being on fire.
Play Trial of the Worm for the first time.
Kill all variants of the Sentinel.
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.
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.