The Stones Unturned Add-on for Mafia III has 10 achievements.
You investigated the scene
You survived the trip to Boicherot's
You got a hot tip on a loose nuke
You helped Donovan end Connor Aldridge
You secured the nuke
Knocked out 30 people with the Dart Gun
Placed an unconscious person in the trunk of a car
Killed 50 enemies using the Hartmann 7.62mm and wearing the Party Animal outfit
Completed all Bounty Hunting assignments
Killed 30 Enemies Using Sniper Support