Devon Aire in the Hidden Diamond Caper is a puzzle game where a widow hires master thief Devon Aire to find her missing wealth hidden around her mansion. The story follows Devon's investigation into each room, which are viewed isometrically and contain various features such as cookers, telephones, and pool tables.
The gameplay involves exploring the rooms, picking up, pushing, pulling, and using objects to find the hidden diamonds. However, be aware of monsters that will move through the rooms, reducing some of your energy if you come into contact with them. You have three lives to navigate through the mansion and solve the puzzle.