thx for the help so far,
It's strange, Crusader of Centy graphics look familiar to me. Visualy, the game was looking very good. But I really doubt that the game I played was on a sega system. At that time, I had a n64 and a snes system and one of my friend had a sega genesis system. So, I knew both nintendo and sega products. When I came in his house and saw the game console of that guy, I couldn't put a name on it at the fist sight. + i remember the little red sun logo.
So I am pretty sure it was a turbo grafx 16. Meaby it was not a ''rpg'' meaby it was a ''action/adventure'' game. Like zeldas, alundras and stuff. Any overhead action/adventure game with dungeons and boss throwing fire balls (not obligatory women-serpent, simple women, or serpent ? very hard to remember sry..). Player and boss hp bar was displayed.