Sasquatch Game Studio was licensed to product the Princes of the Apocalypse sandbox adventure for Wizards of the Coast. Primeval Thule is their own, custom creation that is compatible with the 5E ruleset but exists in its own world of high fantasy and magic. The setting is very reminiscent of Conan and it provides a wide range of adventuring options along with 3 introductory adventures.
http://store.steampowered.com/app/466250/