Arthur's Knights: Tales of Chivalry

This is the story of Knight Bradwen, a King's illegitimate son. Bradwen's story is told two ways - that of a Christian knight who will seek advice from the likes of Sir Lancelot - or that of a Celtic knight who will be guided by Merlin the Wizard and fairies. You choose which story to play at the beginning of the game by picking a red or white book from its pedestal. Each tale is played completely apart from the other, has different paths and quests, and separate save locations. (mobygames.com)