Dragonstone is an action-adventure/action RPG created by Core Design for the Amiga and released in 1994.
It's considered a sequel to Darkmere: The Nightmare's Begun, although the two games are pretty different. Dragonstone looks and plays much more like a Zelda clone, with several levels to explore, people to talk to, puzzles to solve, and a hero armed with a sword and a spell.
The game was criticized for being too short and too easy, but you should try it at least to admire its graphics. Mark K. Jones was one of the best pixel-art artists then, and you can see it in Dragonstone (though the isometric view of Darkmere was unique). If you like this kind of Zelda-like RPG, this is one of the best you can find on the Amiga.