Yuji Horii, best known for his work on the Dragon Quest RPG franchise, is also known in Japan for creating a murder mystery adventure The Portopia Serial Murder Case. That game was released in 1983 for PC titles and is credited with helping to pave the way for Nintendo’s own Famicom Detective Club series. Unfortunately, outside of Japan, Portopia has mostly been known for Square Enix’s attempts to revitalize the game entirely using AI for a maligned 2023 remake. Not content with leaving the AI experiments solely to other people, Horii himself decided to try “developing” his own spiritual successor using Claude.
That game is called Komiya in the Interrogation Room and it’s a short browser-based experience that takes place entirely within the confines of the interrogation of the titular 72-year-old suspect Komiya for a possible safe robbery. Due to the suspect’s constant lies, the player must use various lines of questioning the game provides to uncover the truth underneath them, all while balancing Agitation and Resistance meters. They rise and fall based on your questioning and may lead Komiya to no longer provide answers at all if they reach their maximum of 100.
According to the director’s social media post sharing the game, he only spent about 30 minutes creating it using Anthropic’s AI tools before sharing it, praising the benefits of the technology in game development. “Back when I made The Portopia Serial Murder Case on PC, I had to come up with the story myself, draw the art, write the code, and create everything by myself,” Horii wrote in his post.
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