Gyakuten Kenji in Joypolis

Gyakuten Kenji in Joypolis was a unique game experience based on Ace Attorney Investigations: Miles Edgeworth exclusive to the Tokyo location of Sega's Joypolis chain of amusement parks. Although at its core it was a traditional Ace Attorney investigative game, its most unique aspect was its integration with the park. Players start their game in a replica of Miles Edgeworth's prosecutor's office, where they select one of three cases and are given a physical passport that can track their progress. They then travel between stations spread out over the third floor of the park to gather clues and interrogate witnesses and suspects. Each station has an arcade machine featuring a touchscreen and a spot to scan the passport; upon scanning their passport, players are taken to an investigation or a conversation with one of a few witnesses for the case. Like in the traditional Ace Attorney games, gameplay is primarily visual novel-style dialogue with branching dialogue options. After completing all of the stations on the floor, players can return to the office in order to complete the case. The story uses characters from other games in the series, but is considered non-canon; characters' backstories sometimes conflict with how they were previously depicted.

There are three cases available; each session allows the players to play through one of them.

• Turnabout Symbol: Taking place in the theme park Diverland, a murder occurs during a public performance and it's up to the player to solve it.
• Turnabout Message: An investigator enters Diverland in the hope of uncovering a secret hidden there, only to wind up being murdered.
• Turnabout Theme Park: The guards of the Golden Treasure, a Korean national treasure, are murdered and it's up to the player to solve this final mystery.