Capcom Moves to Transform RE Engine Into an AI-Generation Game Engine

REX aims to shorten AAA development cycles by using AI to automate code creation, run automated test plays, publish select engine technologies for external model training.

Overview

Capcom announced at its Capcom Open Conference RE: 2026 on Saturday that it will evolve its in-house RE Engine under a program called REX to make the engine usable by AI-driven development tools.
REX will introduce specific tools such as Re:Dox for unified data handling, RE:UI for AI-assisted tool optimization, RE:Runtime for group animation processing, and RE:Flows to convert design ideas into a common programming language for AI to read.
The project will move parts of RE Engine to a more common programming language so AI can generate code and run automated test plays that check for bugs and speed QA processes.
Capcom says it will publish some engine technologies online so others can use them for AI training, a step that raises practical questions about what training data will include and how company IP and community use will be managed.
Company leaders stressed that AI is intended to augment creators rather than replace art production, and the move fits a broader industry trend noted by Google Cloud that AI is already embedded in modern game development.