King Colossus or Tougi Ou King Colossus is an action/RPG that released back in 1992 exclusively in Japan and the Sega Genesis / Mega Drive System. The game developed by Sega, Makoto Ogino, Brainbusters, KNU, and Team D-Axe.
The gameplay is pretty similar to the Ys's.
The game's main hero is a wanderer who has amnesia. An elder put him in charge of finding an old sword that a thief called Zakkar came in and took it while the wanderer was busy fooling around. The elder has forced him to retrieve the sword. So the adventure begins...
Althought the game had never released outside Japan, some fans have already translated it!