Mafia III

Bounty missions will become available after completing the main narrative of the DLC. Once the final cutscene concludes and you are loaded back into the game world, you will receive a notification about Marshall's Bounty service.

There are three Bounty missions in total, each of which consists of driving to the target's location in the city, chasing them down as they try to escape, stunning them with the Dart gun, stuffing their bodies into the trunk of a car, and delivering them back to Marshall's office. It should take no longer than twenty minutes to complete all three missions, and once you do, the achievement will finally unlock.