In 2016, I stumbled upon an eBay auction selling a cartridge version of M.U.L.E. for the Atari 5200. It looked like quite a “professional” job, but it seems it is just a private/”homebrew” project/production. Nothing further is known about this version, such as how many units of it were produced. And because I do not own an Atari 5200, I passed on the opportunity to purchase it. If anyone has that version of M.U.L.E. at home and can shed further light on this version, please contact WoM.