The Pulse
Capcom Details REX Plan to Make RE Engine AI-Ready
Capcom presented REX, a staged upgrade to its RE Engine, at its October 2, 2026, developer conference. The plan focuses on faster development tools and a foundation for AI-assisted coding and testing, not a new engine built from scratch.
AI.info Team ·
Capcom’s REX plan would update the RE Engine in stages, adding new systems for handling data, building game behavior and managing development tools rather than replacing the engine outright. Programmer Satoshi Ishida presented the project on October 2 at Capcom Open Conference RE:2026 in Tokyo, outlining how the company wants its engine to support AI-assisted development and testing.
REX builds on an engine used across Capcom
Capcom launched RE Engine with Resident Evil 7 in 2017. More than 27 games have since used it, and more than 2,000 Capcom developers rely on it, according to GameBiz’s account of Ishida’s presentation. Capcom’s own announcement ahead of the conference identified three pressures behind REX: games have grown larger, engine use has spread across a bigger and more varied developer base, and AI tools are advancing.
The company said increasing asset counts and code size have slowed tasks such as retrieving assets, operating editors and building scripts. Its announcement also pointed to automated testing and quality assurance as areas where AI agents could help. REX is meant to address those workflow strains by introducing technologies incrementally into the existing engine.
Five systems target different production bottlenecks
RE:Dox converts different data formats into a shared structure for faster processing and editing. RE:UI reworks development-tool interfaces, separating their appearance from their underlying state. RE:Flows lets developers assemble gameplay behavior visually and converts it into a standard programming language.
RE:Runtime is intended to process large numbers of characters more efficiently and translate code into Capcom’s RE:C++ language. RE:Log changes how development logs are managed. GameBiz reported that Capcom has made RE:Dox and RE:Log technologies available online, with the stated aim of giving AI systems material to learn from.
AI is aimed at code and testing, not game content
The REX presentation described a system built around widely used programming-language rules, which could make its code easier for both developers and AI tools to read. Ishida discussed a future in which AI could understand code, write programs and run tests to find bugs. Those are goals for the project, not capabilities Capcom says are already shipping in its games; the company has not announced a timetable for them.
The distinction matters: the plans described at the conference concern development infrastructure and quality assurance. They do not amount to an announcement that AI will generate art or other content in finished Capcom games. Capcom’s public pre-conference description likewise framed the AI work around automated testing and QA.
A gradual successor, not a clean break
Capcom had already described REX as the next generation of its engine in its 2025 integrated report, saying it would evolve RE Engine step by step rather than replace it completely. The company wrote: Rather than completely replacing RE ENGINE, we plan to evolve it step by step, integrating new technologies in line with trends in IT. Capcom, Integrated Report 2025
That gradual approach lets Capcom target several parts of production without announcing a single cutover to a new engine. The October 2 presentation laid out the systems and AI ambitions, but did not give a schedule for when the full REX plan will reach Capcom’s game teams.