Finders Keepers is a flip-screen platform game released on the ZX Spectrum, Amstrad CPC, MSX and Commodore 64.
The three sequels are far less action-orientated, being effectively graphic adventure games using a basic menu system ("Windimation") for Magic Knight to interact with characters and items instead of typed commands.
The wizard Gimbal accidentally mixes up a spell, which results in casting himself, Magic Knight and an array of other characters into an unknown castle.
After freeing Gimbal, the spell to send Magic Knight home goes wrong, and instead of being sent back to the Middle Ages, he awakens on the USS Pisces in the 25th century.
Variation is added to the gameplay by the addition of objects, which can be picked up and utilised, or traded with the Traders that are scattered throughout various points in the castle (and coincidentally look exactly like Magic Knight).
It introduced the "advert" item, which appeared to have no purpose, but was essential as it could be stood on, allowing Magic Knight to reach otherwise inaccessible areas.
[3] A game called Crime Busters featuring a detective in a mansion, was released by IJK Software in 1986, and found to use significant portions of the Spellbound code.