The Isle of Endless Fog
This adventure of level 1 to 4, with 80 pages, is available in DriveThruRPG (link below). It’s a survival sandbox based on D&D’s three pillars: exploration, social interaction and combat.
It also contains 11 unique maps (20 with their different versions).
Product link: DTRPG
There’s also an add-on extending the maps to 32 unique maps (81 with their different versions).
Product link: DTRPG