My main D&D campaign, based on Chult (with only vague references to the Forgotten Realms). Sandbox. I add/graft anything I want to it.

Quick Overview

There’s no Death Curse
Sandbox style but not go-wherever-haphazardly sandbox, more like discover-stuff-that-lead-to-something-else sandbox
There’s no goal except to explore and find treasures
If you play one of the PH’s races it means you come from the “Old World”
There’s a 2 months sea travel from the Old World to Chult
Aarakocras, Grungs, Batiris, Lizardmen, Albino Dwarves and Yuan-Ti are all natives of Chult and can be selected as PC race too.
There’s one city in Chult, Port Nyanzaru, ruled by the Council of Seven
Dinosaurs are part of the normal fauna of Chult
Ubtao does not exist. Instead, there’s many minor deities or Jungle Spirits, some subjugated by more powerful ones
The Flaming Fist mercenaries act much like an East India Company
Old World’s Dwarves of the Pick & Axe co don’t like Chult but they do like its abundance of gems