Capcom Open-Sources RE:Dox Engine Tech, Boosts Data Processing Up to 2.84x

Did you ever think Capcom would give away part of its game engine for free? Well, that's exactly what's happening. The company just dropped RE:Dox, a data-handling library that's a key piece of its next-generation REX engine project, and it's all open source under the Apache-2.0 license.

So what is RE:Dox? It's a token-based structured data engine for .NET that standardizes how different data formats are processed, making everything faster to read, edit, and manage. Capcom even shared a fun example on GitHub: imagine you have a level 42 Leon with a handgun and green herb in JSON format. With RE:Dox, you can easily load that data, rename him to Claire, and even add a knife to his inventory. It's that simple.

The performance gains are no joke. According to Capcom's own benchmarks, RE:Dox can handle parallel JSON deserialization up to 2.84 times faster than .NET's standard System.Text.Json. Of course, real-world results will depend on your data structure, runtime environment, and CPU, but that's still a massive potential speed boost.

But RE:Dox isn't just a standalone tool—it's part of something bigger. Capcom's REX project, announced back in October 2023, aims to evolve the RE ENGINE (the tech behind Resident Evil 7, Monster Hunter Wilds, and more) by integrating AI and machine learning. REX is made up of six different projects, and RE:Dox is just one of them. Others include RE:UI for AI-assisted tool optimization, RE:Runtime for group-based animation processing, and RE:Flows for simplifying game mechanic implementation. The goal? Make life easier for the over 2,000 developers using RE ENGINE across the globe.

Now, before you worry about AI taking over game development, Capcom has made it clear: they won't use AI-generated assets directly in games. Instead, they're focused on using AI to boost efficiency and productivity—things like data processing, tool optimization, and programming. So your favorite characters and art are still made by humans.

If you're a student or researcher in Japan, you might be able to check out RE:Dox in person. Capcom is holding a second technical showcase at the CAPCOM Open Conference RE:2026 in Osaka on October 17 and 18 at HERBIS OSAKA. The event is open to vocational school students, university students, and graduate students. The first event in Tokyo just wrapped up on October 3.

It's cool to see Capcom opening up its tech like this. Will you be tinkering with RE:Dox? Or are you just excited to see what the REX engine brings to future games? Let us know in the comments!