Mr. Mephisto is a video game developed and published for the Commodore 64 by Euro-Byte. It was written by Dave Lucas with graphics by Graham Hunt. The game consists of a number of levels through which the player had to navigate to collect rings and then make it safely to an exit. A team of demons attempt to block the player's path. Contact with a demon results in instant death, and one or more scrolling staircases further hamper the player's progress.