 |
| REX: RE Engine gets AI workflow upgrade. |
Capcom is quietly evolving its RE Engine into something bigger, and it has everything to do with AI. At Capcom Open Conference RE:2026, held at the Ariake Convention Hall in Tokyo on October 2, 2026, programmer Satoshi Ishida took the stage to explain the REX project—short for RE neXt Engine. Rather than replacing the RE Engine outright, REX represents a gradual, layered upgrade. The conference continues in Tokyo on October 3, with an additional leg in Osaka on October 17 and 18.
Why Capcom Is Upgrading RE Engine
The RE Engine made its debut with Resident Evil 7 back in 2017, and since then it has powered more than 27 Capcom titles. Today, nearly all of Capcom’s developers—over 2,000 people—rely on it. According to Ishida, three major pressures are driving the need for change: games have become so large that iteration has slowed down, the developer base has grown more diverse, and AI technology is advancing at a rapid pace.
REX is designed to address these challenges by targeting performance, tools, development efficiency, and quality assurance. Instead of throwing out the existing engine, Capcom is adding new components over time. As reported by GameBiz, this incremental approach allows the studio to modernize without disrupting its current pipeline.
What REX Adds to the Toolkit
The REX project is built from modular components, all prefixed with "RE." Here’s a breakdown of what each one brings to the table:
- RE:Dox – Converts different data formats into a common structure for faster processing.
- RE:UI – Makes development tool interfaces lighter and saves memory by separating appearance from state.
- RE:Flows – A visual tool for building gameplay that automatically converts into a standard programming language.
- RE:Runtime – Handles large numbers of characters more efficiently.
- RE:Log – Overhauls logging and communication, collecting logs in a central store that developers can search.
These tools are designed to make development smoother and more scalable, especially as games grow in complexity.
How AI Fits Into Capcom’s Vision
Ishida described the end goal as building "a game engine for the AI generation." To get there, the entire system now follows the rules of a widely used programming language, which should make the code easier for AI to read and understand. He also pointed to a future where AI can comprehend code, write programs, and even run tests to catch bugs automatically.
That said, these are goals—not shipped features. Capcom hasn’t announced when these capabilities will reach its games. The reported plans focus on development tools and testing, and as per GameBiz’s account, there’s no mention of AI-generated content in finished games. For more technical context, TechTroduce offers a deeper look at the REX project’s architecture.
Open-Source Plans and Industry Impact
Capcom has already released some REX technologies publicly, including RE:Dox and RE:Log. The goal is to give AI tools more material to learn from. However, this doesn’t mean the RE Engine itself is becoming a public engine. As noted by SBBIT, Capcom is selectively sharing components while keeping its core proprietary technology in-house.
By open-sourcing certain tools, Capcom hopes to accelerate AI development across the industry while maintaining control over its own engine. It’s a strategic move that balances collaboration with competition.
What This Means for the Future of Game Development
Capcom’s REX project signals a shift in how game engines are being designed—not just for human developers, but for AI systems that can assist, optimize, and eventually automate parts of the development process. While we’re still far from AI writing entire games, the groundwork is being laid.
For now, REX is a work in progress. But if Capcom’s vision pans out, it could set a new standard for how game engines evolve in the age of AI.