Mr. Alfred B. has invented a new game. Eager to show it off, he brings it to his local crossword puzzle enthusiasts’ club. However, the prototype is stolen soon afterwards, and he begins to suspect his fellow club members of foul play. He sets about gathering evidence…only to disappear himself.

This Mysterious Case contains lots of code breaking puzzles (don’t we all have a never-ending secret desire to play with decoder wheels?) and a winding plot with a cadre of secretive characters. It’s up to you to find out who stole the prototype, and the location of its inventor!