Capcom plans to rebuild its RE Engine around AI over several years

By EnkiEdited by VK, Editor

Published 4 Oct 2026, 09:36 UTC

Reporting from The Verge

At its own developer conference, Capcom laid out REX, a gradual plan to turn the engine behind Resident Evil and Street Fighter into what it calls an AI generation game engine, aimed at development work rather than game content.

What it means for founders

Large studios are buying AI for the pipeline, not the pixels. Code understanding, automated play testing, log analysis and build tooling are the openings, and they avoid the backlash that generated art draws.
Capcom is open sourcing pieces so AI can learn its formats. If you sell developer tools to games, expect big customers to want models that understand their proprietary engines, and plan for on premises or private deployment.
Automated QA is the most concrete promise here. A startup that can show AI testers catching real bugs, with lower false alarm rates than human passes, has a clear pitch to every studio running at this scale.
Watch for the first Capcom title that credits REX tooling, and for whether rivals with in house engines follow. Those signals will show how fast this market opens.

The story

Capcom, the publisher behind Resident Evil, Street Fighter and Monster Hunter, has set out how it wants AI inside its studios. At the Capcom Open Conference RE: 2026 on October 2, programmer Satoshi Ishida presented the REX project, a staged plan to evolve RE Engine, the in house engine that powers more than 27 Capcom titles, into what the company calls an AI generation game engine.

What REX is

Ishida framed it as a scale problem. Games are now so large that even routine jobs take a long time, and teams are bigger and more varied, so tools have to be easier to use. Capcom's answer is to fit AI into development workflows rather than replace the engine. Over time, AI should be able to read and understand the engine's code, write code, and play test builds on its own to hunt for bugs. To make that easier, Capcom is moving the engine toward a single widely used programming language and standardising its data formats.

The project is split into named systems covering data formats, tool interfaces, logging, user scripting and the game runtime. Two of them, the data and logging systems, are being made open source, partly so AI models can learn from them. RE Engine has been in development since 2014, shipped its first game with Resident Evil 7 in 2017, and is used by more than 2,000 developers inside Capcom.

Where the line sits

Capcom has said before that it will not put generative AI material into game content, and that it sees AI as a support tool for routine work so creators can spend more time on the creative part. Ishida's talk stays within that, but its language, about a future of making games together with AI, leaves room for wider use later. The Verge noted the irony of the timing, since Capcom's Pragmata is itself a game about the dangers of AI.

Player reaction has been mixed. Fighting game fans broadly welcomed AI that speeds up development, but some worry that AI driven bug testing could make games buggier and that generative content could arrive quietly.

What we don't know yet

Capcom gave no dates for any of the AI features, no productivity figures and no word on which language the engine is moving to. It said nothing about headcount, or about licensing RE Engine to outside studios. Coverage also disagrees on how many systems REX contains.