I sadly never got the chance to play it in table, so I’m hoping that some day some dev will adapt it. The 3rd edition of Hyperborea got US$172k in KS.
Thematically, the game is very “Conanesque”
The game has the following subclasses.
Fighter subclasses :
Magic user :
The level cap of the game is 12. The world is much less magical than Golarion. You can see greater daemons with CR = 8 in the game.