 Blackwyche is an action @-@ adventure video game developed and published by Ultimate Play The Game for the Commodore 64 in 1985 . The game is the third instalment of the Pendragon series and is a sequel to <unk> . In the game , <unk> adventurer Sir Arthur Pendragon is trapped on board a haunted galleon and must free the soul of its captain . The game is presented in a 3D isometric format . 
