I would say that Retrozone's was an unofficial release because at the time, I don't think anyone really gave a shit about unreleased game's prototype's being found. It's over ten years later and buying old IP rights is now a thing. I think Sunday Funday and Greg Pabitch's release of Cheetahmen were the first actual reproductions, where they got the rights to the game and rereleased it. In this case, he's not wrong in saying this is the first official release if he has the rights to make it.