Running on a MiSTer, which I was told would be valid for non-emulator runs, due to being perfect hardware emulation, as well as how Amiga 4000s are uh, literally not possible to find.

MOD EDIT: Although all other consoles on this leaderboard are definitely original hardware, Liz does have a point in that an Amiga + Myst is exceedingly hard to find, and even when you do find it, very little in the way of empirical video documentation of Myst on Amiga (other than the various YouTube description with no other supporting evidence) exists.

Therefore, in the face of the fact that this is obviously not the fastest way to play Myst, and that no other person has come forward with a submission on original hardware to compete with this time, it is being approved as non-emulated.