Mystery P.I. - The London Caper is a hidden object game program developed by SpinTop Games and published by WildTangent, Inc. It was initially released on April 21, 2010. It is part of the Mystery P.I. Hidden Object series and is the first European installment of the series. The game’s background story involves the Royal Family and the stolen priceless Crown Jewels. The thieves threatened the Royal Family that the jewels will be destroyed if the ransom is not paid within 17 hours. The player will act as the Mystery Private Investigator and the Royal Family hires the player to search for the priceless artifacts before the time runs out.
Mystery P.I. - The London Caper features more than 2000 objects hidden in 25 London, England locations. The Royal Family will reward the player £10 Million Pounds if the player succeeds. There are three game modes in the game. The first is the main game mode, where players will try to solve the mystery and find the Crown Jewels. Players will not only have to find hidden objects. There are also puzzles at the end of each level. Solving the level-end puzzles will give the player clues needed for the final puzzle. The other two game modes are bonus game modes – Unlimited Seek & Find and Match 3 Bonus Game. The bonus games are locked until the player can find all the keys and crowns hidden within the 25 locations found in the main game mode.