Dragon Quest creator Yuji Horii releases AI-built mystery game in 30 minutes

Key points

• Yuji Horii released 'Komiya in the Interrogation Room,' a free browser-based adventure game, on October 11, 2026.
• Horii claims he developed the game using Anthropic’s Claude AI in about 30 minutes, without writing code or drawing art.
• The game features a 72-year-old suspect named Komiya, where players must balance 'Agitation' and 'Resistance' meters to uncover lies.
• Horii contrasted this process with his 1983 creation of The Portopia Serial Murder Case, which he handled entirely alone.
• A traditional remake of The Portopia Serial Murder Case is planned for 2027, developed by G-Mode with Horii as general director.

Background

This development follows a period of increased AI integration in the gaming industry, including Google’s launch of Playground and Unity Spark in October 2026. It also contrasts with a 2023 Square Enix AI preview of The Portopia Serial Murder Case, which received mixed reviews due to low polish. Horii is currently working on the scenario for Dragon Quest XII, which underwent a major reboot recently.

How outlets are covering it

Kotaku and Inven Global report the facts of the release and Horii’s 30-minute creation claim, with Inven noting the game’s free availability via a Claude Artifact link. GamesRadar+ frames the release as 'AI slop,' reflecting a critical stance on AI-generated content, while Kotaku and Inven present Horii’s enthusiasm for the technology. All sources agree on the game’s mechanics and Horii’s public praise for AI, but differ in their editorial tone regarding the quality of AI-generated games.

Why it matters

Horii’s endorsement of AI tools highlights a shift in game development workflows, where traditional skills like coding and art are being supplemented or replaced by AI. This move by a legendary figure in the RPG genre signals broader industry acceptance of AI, despite ongoing debates about the quality and ethical implications of AI-generated content.

What to watch

A traditional remake of The Portopia Serial Murder Case is expected in 2027 for Switch 2, Switch, and PC. Horii will continue working on the scenario for Dragon Quest XII, which is currently in development.