Here's one im currently playing
Uncharted waters: New horizons (Genesis)
it's a sequel to the 1st Uncharted waters which i never played
Description :
"Like the original, UWNH is a Wide Open Sandbox with RPG Elements, offering you the world's entire oceans to explore. The trading and combat mechanics remain mostly the same with a few new tweaks, but the exploration mode of the game was completely revamped: you now gain fame not only by discovering remote ports, but by searching native villages for unique discoveries, ranging from geographical or cultural wonders to exotic plants and animals. You can then sell these discoveries to the highest bidder, as well as make maps of your voyages and sell them to cartographer guilds for a nifty profit."
This game was ported to the Snes too but im playing the Genesis version cause it's one of the few rpgs the Genesis had.