Dragon Quest creator Yuji Horii released a playable text adventure on October 11, 2026, saying he created the entire project with AI software in about 30 minutes. It’s a browser project that shows how text models let creators build working game builds without writing manual code or drawing art. Horii shared the new Yuji Horii AI game on social media, telling curious players that new tools can turn text instructions into working software in under half an hour [1].
How the Yuji Horii AI Game Works
The build runs inside web browsers through Anthropic’s Claude, presenting players with a compact mystery puzzle where every step flows through text prompts [3]. Players step into an interrogation room with Komiya, a 72-year-old locksmith suspected of robbing a pawnshop’s safe. Instead of selecting fixed dialogue trees, visitors submit written questions to tease out clues and reveal flaws in the suspect’s testimony. The setup doesn’t rely on complex graphics, keeping the visual presentation minimal so the underlying model can handle the player dialogue [1].
Gameplay rests on tracking two status meters labeled Agitation and Resistance, which react quickly to the questions players ask during the session. If Komiya’s agitation climbs, his nervous guard drops and he becomes much easier to crack with evidence, but pushing his resistance to 100 causes him to shut down completely and refuse further speech [1]. Players have until a defense lawyer arrives at 11pm to break through his persistent lies and secure a full confession. Horii gave players a playful tip when sharing the link, warning them not to press the boost button while testing the scenario [2].
Horii explained that AI tools remove barriers that previously stopped aspiring creators from finishing story games on their own. “And now, by using AI, even if I can’t draw pictures or program, I can just give instructions to the AI and create a decent game all by myself. It’s truly astonishing,” Horii wrote in his public message [2]. He said that’s how AI models turn ideas into working logic within minutes, letting solo designers test games without hiring outside art assets or engineering teams [3].
Inside Interrogation Room Komiya
The game’s title, Interrogation Room Komiya, follows Horii’s love for mystery fiction and dialogue gameplay mechanics [4]. Players must listen carefully to Komiya’s evasive responses, comparing his claims about the safe burglary against clues uncovered by the police. Because the elderly locksmith often contradicts himself, finding gaps becomes the key to raising his agitation meter. It isn’t a passive visual novel where choices are predetermined; players have to craft their own wording to catch the suspect off guard before his legal help steps through the door [1].
Horii crafted the scenario by feeding character parameters, plot constraints, and reaction rules directly into the language model during his brief drafting session. Instead of coding complex logic trees in programming languages, he simply instructed the software on how Komiya should react to pressure, when he ought to deflect blame, and what threshold triggers his stubborn silence [3]. That hands-on approach allowed the 72-year-old designer to produce a complete playable demo in about 30 minutes, showing how text prompts can substitute for months of standard game work [2].
Early players discovered that Komiya’s AI responses could occasionally wander if prompts lacked clear direction, mirroring common quirks in text generation tools. Yet the structured framework Horii created kept the suspect anchored to his pawnshop alibi, giving the brief browser mystery a cohesive plot arc [3]. The experience feels closer to a police simulator than an older text adventure, proving that focused prompting can yield fun story loops with minimal overhead [1].
From Portopia to Modern Solo Development
In his announcement, Horii explicitly drew a parallel between his 30-minute AI test and the creation of his iconic 1983 detective game, The Portopia Serial Murder Case [1]. When developing that seminal adventure title for Japanese personal computers, he handled every phase of production without help, writing the narrative, sketching the pixel art, and coding the game by hand [2]. “I came up with the story myself, drew the pictures myself, did the programming myself, and created the game all by myself,” Horii recalled, contrasting the grueling months of solitary work in 1983 with the ease of typing prompts into AI engines [1].
The Portopia Serial Murder Case proved hugely popular in Japan, later earning a Famicom port that helped inspire Nintendo’s beloved Famicom Detective Club series. Its text parser and investigative structure built fundamental conventions for visual novels and crime adventures throughout the 1980s. Outside Japan, however, the title gained renewed attention in 2023 when Square Enix released an AI-driven remake that drew sharp criticism from fans due to unresponsive natural language processing and frequent parsing errors [3].
Rather than being discouraged by that earlier misstep, Horii decided to explore chat algorithms firsthand to see how well new technology could handle detective storytelling. As the co-writer of Chrono Trigger and the father of the Dragon Quest franchise, he has spent decades refining how players talk to non-player characters in role-playing games [3]. His quick Claude test suggests that chat models have improved enough to make interrogations fun rather than frustrating, fulfilling creative goals that weren’t possible during the early PC era [1].
Dragon Quest and Chatbot Experiments
This playable build isn’t Horii’s first encounter with AI technology in recent months. Earlier this year, Square Enix partnered with Google to implement a Gemini-powered chatbot called Chatty Slimey into the multiplayer online role-playing game Dragon Quest X [1]. The digital companion talks freely with players, offering an interactive talking partner for fans who want casual banter while exploring virtual towns [2].
Horii defended the test in a translated interview with Famitsu, explaining that friendly companions help explain artificial intelligence to casual gamers. “Because nowadays AI is really smart, it’s fun. It doesn’t matter what I ask it, it hardly ever makes things up [anymore]… It’s evolving, and lately there are a lot of things you can do with it. Slimey is a conversational partner, so I think it lowers the barrier of entry to interacting with AI,” Horii said [2]. He said that chat tools can make digital non-player characters feel far more responsive to player input [4].
Horii’s vocal enthusiasm stands in contrast to wider industry skepticism about AI tools. Prominent creators like Hideo Kojima have spoken critically about relying on machine tools for creative tasks, arguing that authentic storytelling requires human intent and lived emotional experience [4]. In the wider gaming landscape, voice actors and game developers have voiced deep concerns over job security and creative control. Even as industry debates grow, a CESA survey on generative AI in Japanese development revealed that a large majority of studios are testing new production pipelines [2].
Production Pressures and Dragon Quest 12
Horii’s recent AI tests arrive during an eventful transition period for his flagship fantasy franchise. He is actively writing the main scenario for Dragon Quest XII: Beyond Dreams, a sequel that underwent a major internal reboot over the past year [3]. The upcoming role-playing entry faces heavy emotional weight following the deaths of character designer Akira Toriyama and legendary series composer Koichi Sugiyama, both of whom passed away after the project was originally announced [4].
Despite those profound losses, Square Enix confirmed that Dragon Quest 12 will feature Toriyama’s character designs and Sugiyama’s compositions [4]. Horii remains central to guiding the franchise’s creative identity, balancing big console productions with new ideas. Even as Dragon Quest series sales surpassed 100 million units globally, Horii continues testing novel concepts through quick test builds, exploring whether text tools can’t also support future game design [2].
Beyond the mainline RPG series, Horii’s classic mystery catalog is preparing for a planned revival. Publisher G-Mode is developing an artist-driven remake of The Portopia Serial Murder Case for next year [3]. Additionally, a brand-new sequel titled Next: The Portopia Serial Murder Case was announced in September for 2027, cementing Horii’s enduring love for crime mysteries [1].
Horii’s prototype shows how accessible AI tools are becoming for game makers. New tools like Unity Spark are preparing for testing on Google Playground, letting creators build scenes from text commands [1]. While ethical debates continue shaping how studios adopt these models, Horii’s test proves that experienced storytellers won’t struggle to turn rough sketches into playable games in a single afternoon [5].
- ONLINE NEWS Blake, V. (2026, October 12). Dragon Quest creator Yuji Horii releases game he says he made with AI in about 30 minutes. GamesIndustry.biz. [Article Link]
- ONLINE NEWS Serin, K. (2026, October 12). After Dragon Quest 10 got its own controversial chatbot, series creator Yuji Horii releases a new AI-generated game made in just 30 minutes. Eurogamer.net. [Article Link]
- ONLINE NEWS Haddick, A. (2026, October 12). Dragon Quest Creator Yuji Horii Thinks AI Is Amazing As He No Longer Needs To Code Or Draw To Make A Game. Kotaku. [Article Link]
- ONLINE NEWS McCrae, S. (2026, October 12). Dragon Quest creator Yuji Horii continues his love affair with AI slop as he releases a new game he generated in 30 minutes. GamesRadar+. [Article Link]
- ONLINE NEWS Nintendo Life. (2026, October 12). “It’s Truly Astonishing” – Dragon Quest Creator Yuji Horii Made An AI-Generated Game In 30 Minutes. Nintendo Life. [Article Link]
- ONLINE NEWS Video Games Chronicle. (2026, October 12). The latest game from the creator of Dragon Quest was made in ‘about 30 minutes’ with AI. Video Games Chronicle. [Article Link]
