The Stones Unturned Add-on for Mafia III has 10 achievements.
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
You secured the nuke
You helped Donovan end Connor Aldridge
You got a hot tip on a loose nuke
You survived the trip to Boicherot's
Killed 30 Enemies Using Sniper Support
You investigated the scene
Placed an unconscious person in the trunk of a car