The Mystery at Greveholm (Mysteriet på Greveholm) is an adventure game developed by Vioma and published by Young Genius for Windows in 1997. Based on the advent calendar series by the Swedish public broadcaster Sveriges Television (SVT), the player is tasked to rescue the princess from her own rocket disguised as the tallest tower of the haunted castle by the Count, solving puzzles along the way.
Emil_Borg rescues the princess in record time.