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