The Accursed Crown of the Giant King is an old school role-playing game, single player, party based. It will be released in 2021 for Windows, Mac, and iOS. ACotGK is by Merry Prankster Games, and you can get more information at https://prankster.com/acotgk.
The game is now winnable! There is still some stuff go back in fill in, to finish up all the content for chapter 4, but this is a big step.