is an educational video game published by The Learning Company in 1990[1] for both Windows and Macintosh PCs.

If the player correctly guesses the room the Master of Mischief is hiding in, they will get a bonus score based on time and zapper energy remaining.

If the guess is incorrect or the player fails to gather enough information by midnight, they will lose the game and their lifetime score will not change.

At certain score amounts, the player will advance in rank and the game becomes more difficult, and the match rule changes.

The music played on the title screen is based on Bach's Prelude in C minor, BWV 999.

was reviewed in the Oppenheim Toy Portfolio Guide Book where it was praised for its imaginative gameplay.