King Colossus, also known as Tougi Ou King Colossus, Tougi-Ou King Colossus, or Tougiou King Colossus is a 1992 action RPG developed by Sega, Makoto Ogino, Brainbusters, KNU, and Team D-Axe and published by Sega for the Sega Mega Drive exclusively in Japan. Ogino, a manga author best known for Kujaku Ou/Spirit Warrior (which have had two games based on it developed by Sega), directed the game and created its story and characters; KNU provided sound. Translation group M.I.J.E.T. created an English language fan-translation patch between 2005 and 2006 (as well as a special patch for people who distaste mild language).

The game stars a wanderer who does not know his own history and has a strange crest on his hand. An elder put this wanderer in charge of guarding his sword, which he stashed in a cave, but the thief Zakkar came in and took it while the wanderer was busy fooling around, and now the elder has forced him to retrieve the sword... too bad everything else has to go wrong today too!