The Coleco Adam version dates from 1984.
There is a version available for Plus4 that seems to be an official version as it includes very basic copy-protection (Type POKE 1351,1 (or enter >547 1) before running the game).
[+] Users who have solved this game
[+] Users currently playing this game
There is a Plus4 version from 1984. You can download it here: https://plus4world.powweb.com/software/Bounty_Hunter
But as there is a "copy protection", you have to enter a poke before launching the game: "Type POKE 1351,1 (or enter >547 1) before running the game. (The game uses a primitive copy protection scheme, and checks this memory cell while running. If it is zero, the game will not work.)"