The sequel to Castle Master continues where the first game left off: you’re still trapped inside Eternity Castle and must escape to finally complete your quest.
The Crypt was first released in 1990, but only as a double pack with the first Castle Master (it was never made available as a stand-alone product). It was programmed by Major Developments/Incentive Software and published by Domark.
The PC version has a status screen that shows you how many spirits you’ve currently destroyed; keys in your possession, and it also allows you to save and load a game. Frame rate-wise: it also runs much faster and smoother than 8-bit versions, so is probably the version to play if you’re interesting in trying it out.