"The basic premise of Dark Castle sees your character plonked into a room full of nasty spikes that move from one side of the screen to the other. Your task is to pick up one or more keys and make your way, un-skewered, to the exit. The story, as far as it exists, involves a samurai – you – having to make your way through a series of these rooms in order to retrieve a magical gauntlet that's been stolen by an evil warlord."