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