That’s a transfer within the platform, very different from the scenarios I described. There is no method supported by GOG or Steam to transfer a game to a competing platform.
You can’t open a support case and tell them “sorry I actually wanted this game on GOG, can you transfer it to my account there?”. At best you could ask for a refund, obviously if you’ve played the game enough you wouldn’t even be able to ask for that.
But that wouldn’t give you a Steam copy, which is the scenario I was describing, along with the inverse mentioned in the original comment. There is no method supported by GOG or Steam to transfer a game to a competing platform.
Also in your case, the receiver would only have that one offline installer, the game wouldn’t be in their GOG library, and they wouldn’t get future updates.
There is none in the way of a transfer. Neither Steam nor GOG will give you a copy of the game in exchange for another platform’s copy, nor give you a copy on a competing platform in exchange for theirs.
provided the technical protections measures used by the Game support such transfer
This boils down to if your method of ownership supports it, you can do it. Neither Steam nor GOG support it. A physical disk copy would support it, for instance, so you’d be entirely allowed to transfer ownership of your physical disk copy of the game.
That’s exactly what this is. It’s ARK meets BotW plus pokemon, but the pokemon actively help around your base, you don’t lose them permanently when they die, and you carry them in their pokeballs. And it doesn’t run as dogshit as ARK proper, so that’s something?