Full list of all 85 Mafia III achievements. It takes around 60-80 hours to unlock all of the achievements in the base game on Windows.
The base game contains 55 achievements, and there are 5 DLC packs containing 30 achievements.
Decided Lincoln's fate
Spent at least $500,000
Got eaten by an alligator
You have avenged Sammy and Ellis
Completed all of Cassandra's side-missions
Completed all of Vito's side-missions
Completed all of Burke's side-missions
Reached the Loyal state with one Underboss
You jammed a knife through Santangelo's head
Kept all Underbosses alive until "Yet Here We Are"
Tommy Marcano was burned beyond recognition
You helped Alvarez escape
You left Olivia Marcano to her fate
You burned Remy Duvall on a cross
Recruited 15 Racket Informants
You chased down and killed Frank Pagani
You gutted Lou Marcano like a catfish
You killed Judge Holden
Unlocked all Associates
You tossed Derazio out his penthouse window
You helped Enzo escape
Saved $150,000 between your wallet and the bank
Drove at 120 mph or faster for 20 seconds
Killed an enemy within 2 seconds of kicking open a door
While driving, drifted for at least 5 seconds
While driving, performed a 50-meter jump and landed on your wheels
Executed 10 Vehicle Takedowns
Made 10 enemies kill themselves with their own Molotovs
You turned the Butcher over to Burke
Performed 5 headshots in 5 seconds
You helped Vito capture Michael Grecco
Chained together 3 or more Brutal Takedowns
Attacked a Racket without killing any Enforcers
Burke agreed to help you kill Marcano
Made a 180 degree turn at high speed without hitting anything
Fed a body to an alligator
Vito agreed to help you kill Marcano
Got the maximum earn from one of your Rackets
You hung Ritchie Doucet from a Ferris wheel
Completely weakened a Racket by killing all of its Enforcers
Wiretapped the Delray Hollow Smack Racket
Cassandra agreed to help you kill Marcano
You collected your things from Sammy's
Escaped a Police Zone after being chased for 2 minutes
Stole a Police car
Earned $500,000
Kept only one Underboss alive until "Yet Here We Are"
Reached the Loyal state with all three Underbosses
Received $10,000 in earn from one Underboss
Flipped 16 Racket Bosses
Killed all of the Racket Bosses
Killed 15 Racket Informants
Killed 300 enemies using Takedowns
Performed 100 Stealth Takedowns on enemies
Performed 50 Brutal Takedowns
Fully upgraded the Grow House
Reached the Max Herbalism level
Sold a single batch of weed for $10,000 or more
Destroyed 10 of Slim's re-election billboards
You helped Irma, Jeremiah, and Christian
You captured Slim Beaumont
You helped MJ and Roxy get the Witnesses free
Successfully triggered 10 Vehicle Traps
You survived the drive into Sinclair Parish
Killed 30 enemies using Proximity Mines
Killed 50 enemies using the Hartmann 7.62mm and wearing the Party Animal outfit
Knocked out 30 people with the Dart Gun
Completed all Bounty Hunting assignments
Placed an unconscious person in the trunk of a car
You secured the nuke
You helped Donovan end Connor Aldridge
You got a hot tip on a loose nuke
Killed 30 Enemies Using Sniper Support
You survived the trip to Boicherot's
You investigated the scene
Drove a distance of 50 km in the Samson Harrier
Fully renovated Sammy's
Protected Sammy's from the Dixie Mafia
Began Sammy's Renovation
You killed Bonnie Harless
Killed 4 enemies using Slow-Mo Shooting 10 Times
Investigated the 3 "Places of Darkness"
Killed 20 enemies using Throwing Knives
You met Bonnie Harless
You investigated the cult's activities at Sammy's