SO I am super glad I found this page, cause I have 2 games that I loved playing but cannot find through all my google searches.
1 was on a sega console though I am not sure which one, this would have been late 90s, and you were a young hero out to save a princess, and there were lots of major scenery changes as you went to like magical realms and different areas of the kingdom, there were lots of little unique items and wierd powers you could get to help navigate puzzles and combat, and one as silly as it was, was a ring that would turn you into a beaver type animal.
2 The other game I am less sure of the console, but have a better description. It starts out in a small village that is layed out in a kinda zigzag ladder up a hill layout, and a monster/demon is summoned from a well or something in the village and kills everyone, but this kid survives and gets knocked out, i believe because of a ring, and you go around the kingdom doing small missions and collecting these rings of power trying to gather forces to fight the dark demon, and there is another kingdom in the sky of winged people on a floating island of some sort.