Moonstone: A Hard Days Knight is an action role-playing video game by Canadian independent developer Rob Anderson and published by Mindscape for the Amiga in 1991 and one year later converted to DOS with different sound and music. The title is a play on A Hard Day's Night. Moonstone's gameplay blends several different genres, allowing up to four players to participate in a basic turn based game with real time combat for any encounters. It is also notable as one of the goriest games of its time, with some particularly bloody fight and death scenes. Magazine advertisements for Moonstone purported 'nearly' a thousand frames of animation for two megabytes of monsters, and over 60 different painted backdrops.