It was released for the ZX Spectrum, Commodore 64, Amstrad CPC, Amiga, Atari ST and IBM PC.

The player's only weapon is an unlimited supply of rocks to throw, but a single hit is sufficient to exorcise most of the spirits.

Castle Master was built on the Freescape engine, which allows solid, fully three-dimensional environments to be produced.

The same engine had been used for Driller, Dark Side and Total Eclipse which had previously been released by Incentive Software.

Castle Master marked the first release in a deal with Domark who marketed the game leaving Incentive free to concentrate on the development.