The game starts off with the end of Dark Castle, where Prince Duncan toppled the Black Knight's throne.

In the original version, after toppling the throne, the Black Knight stands up shaking his fist, and a gargoyle drops Duncan in Trouble 3.

When starting a new game in Beyond Dark Castle, the player sees Duncan approaching a fireplace and mantle.

Over the course of the game, the player collects five orbs to fill these pedestals, opening a gate that leads to the final duel with the Black Knight.

Computer Gaming World said that Beyond Dark Castle was superior to its predecessor, approving of the new save and practice options.