Clan O'Conall and the Crown of the Stag is a side-scrolling adventure puzzle platformer with puzzle elements in a fantasy setting. The Mother of Demons, Kaoranach, invaded the home of the O'Conall clan and stole the ancient Crown of the Stag. With her help, she wishes to destroy the long-standing peace between the Mortals of Hibernia and the Fairy People. All that stands between her and mass destruction are the three heirs of the O'Conall clan: swordmaster Kilcannon, huntress Clackshot and Haggish the Brute.