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