Week 44, 2026 ·
Ratchet & Clank reaches 100% matched, and Going Commando climbs to 84.74%
By @Lynder063 with Claude Code
16.25 MB
OF CODE VERIFIED7 titles · 8 projects · 22 mods
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Ratchet & Clank series, rebuilt from the original bytes
A hub for the community decompilations of Ratchet & Clank: readable source code that compiles to the original games' exact bytes
Unofficial and community driven. You need your own copy of the original game to play. Learn more →
Progress
The percentage is the share of each game's code that compiles to exactly the retail bytes.
Original Trilogy & Deadlocked
The four PlayStation 2 releases of the main series, from the 2002 debut to the combat arena of Deadlocked.
Ratchet & Clank
decompilation · 2002PAL · Europe
100,00 %
data 99,95 %
Ratchet & Clank
decompilation · 2002NTSC-U · USA
100,00 %
data 77,18 %
Going Commando
decompilation · 2003
94,26 %
data –
Up Your Arsenal
decompilation · 2004 · PAL
10,42 %
data –
Ratchet: Deadlocked
decompilation · 2005 · NTSC-U
9,52 %
data –
Spin-offs & Handhelds
Handheld and spin-off entries in the Ratchet & Clank universe.
Going Mobile
Java reconstruction · 2005 · J2ME
100,00 %
data –
Size Matters
decompilation · 2008 · NTSC-U · PS2 port
28,88 %
data –
Secret Agent Clank
decompilation · 2009 · NTSC-U · PS2 port
0,57 %
data –
The figure is matched code, weighted by size, the same number ByteMatch shows; the data figure and the fainter bar under it are the share of the game's data that matches, where the project's report measures it. Each title links to its own community repository, and a title without a link has not been started. Numbers are read from the repositories on the server and refreshed every ten minutes. Roadmap entries are not a promise.
Get involved
You do not need to be a reverse engineer. Every project here welcomes newcomers.
Say hello
Join the Discord, tell us what you are curious about and pick a starting point with people who have done it before.
Set up
Follow the setup guide of the project you like. You will need your own legally obtained copy of the game, we never provide one.
Pick a function
Take a small one, get it to compile to the same bytes and open a pull request. Reviews, notes and tooling help just as much.
Latest news
What happens across the projects, week by week.
Recent activity
The latest commits across the tracked projects, straight from GitHub.
- DLMerge pull request #113 from ReaperOfVeriod/docs/function-reservations
- DLMerge pull request #114 from Sumaiter/decomp/pal-auto-review10
- DLRemove trailing whitespace from reviewed PAL sources
- DLUpdate native maps and PAL progress for 41 reviewed functions
- DLMatch 12 PAL functions from automatic-search review
- DLMatch 29 previously reviewed PAL functions
- SMMerge pull request #218 from OpenRAC/decomp/level-small200-round5-20261106
- SMMatch 334 bounded USA level placements of 148-192 bytes
How it works
Matching decompilation, in three steps.
Disassemble
Your own copy of the game is split into code and data. Nothing extracted from it is ever stored in the repository.
Rewrite
We write plain C for each function and compile it with the same compiler and flags the original developers used.
Verify
If the output matches the original bytes exactly, the function counts as done. The build and progress report are public and reproducible.
Resources
Tools, guides and related work that decompilation projects like these rely on.
Project guides
- Ratchet & Clank (PAL)From assembly to a match · rac1-decomp
- Ratchet & Clank (NTSC-U)Build guide · Lombyte
- Going CommandoStart here · rac2-gc-decomp
- Up Your ArsenalStart here · rac3-decomp
- Ratchet: DeadlockedResearch notes · rac4-decomp
- Going MobileBuild and verify · going-mobile-decomp
- Size MattersRoadmap and status · rac5-sm-decomp
- Secret Agent ClankStart here · rac-sac-decomp
Tools
- ByteMatchProgress tracking for decompilation projects, the same numbers shown here.
- decomp.meMatch a single function together, right in the browser.
- objdiffCompares compiled output against the original, instruction by instruction.
- splatSplits a binary into code and data segments.
- spimdisasmThe MIPS disassembler behind splat; the PS2's main CPU is MIPS.
- m2cTurns MIPS assembly into a first draft of C to start a match from.
- GhidraReverse engineering suite for exploring code, data and call graphs.
- PCSX2PlayStation 2 emulator with a debugger, for watching the code run.
FAQ
The short answers.
Is this a way to play the game for free?
No. OpenRAC contains no game assets, no game code and no game binaries. To build anything, the PC port included, you need your own legally obtained copy of the game.
How is this different from OpenGOAL?
OpenGOAL targets a different game and toolchain. OpenRAC follows the same spirit: understand a classic game, document it, and make it possible to study and preserve. Our method is byte-matching decompilation.
Is there a PC port?
Yes. A native PC port is built from the decompiled code, and the launcher sets it up from your own disc. It is a result of the decompilation and a way to show how the reconstructed code runs, not the main focus. The goal stays a complete, accurate source reconstruction of each game.
Can I mod the PC port?
Yes. Community mods are listed at openrac.dev/mods: press Install and the launcher adds the mod with everything it needs, and keeps it up to date. Mods are made with the OpenRAC SDK, and anyone can list theirs.
What do “matched” and “percent” mean?
A function or method is matched when the reconstructed code compiles to exactly the same instructions or bytecode as the retail build. The percentages reflect verified code and functions divided by the totals.
Are the other titles being worked on?
Yes, and every one of them by an independent team. Each project has its own people, its own repository and its own way of working. This page only gathers them in one place.
- Ratchet & Clank2002rac1-decomp · PALLombyte · NTSC-U
- Going Commando2003rac2-gc-decomp
- Up Your Arsenal2004rac3-decomp · PAL
- Ratchet: Deadlocked2005rac4-decomp · NTSC-U
- Going Mobile2005going-mobile-decomp
- Size Matters2008rac5-sm-decomp · NTSC-U
- Secret Agent Clank2009rac-sac-decomp · NTSC-U
Working on a Ratchet & Clank decompilation?
We offer every team the same thing: one shared place where people can follow your progress next to the others, measured the same way and linked straight to your repository. It is an invitation, never a requirement. Nobody has to join OpenRAC or move a project under it, and the offer stands for everyone.
How can I help?
Read CONTRIBUTING.md on GitHub. Reviewing, documenting function behavior, and improving tooling all help, not just writing matches.
Do you accept assets or dumps from the game?
No. Please do not upload or link game files, dumps or other copyrighted material to issues, pull requests or the community channels.
Our view on AI
Parts of this project are built with the help of AI coding assistants. We think that should be stated plainly rather than hidden, so here is how we use it and where we draw the line.
What it does here
Matching decompilation is unusually well suited to machine help because success is objective. A function either compiles to the original bytes or it does not. An assistant proposes C, the compiler judges it, and that result is the only thing that counts. A wrong guess costs nothing and never ships.
Our weekly news reports are written with AI as well. A named person uses a tool of their choice, reads the result and submits it for review. Each report says who wrote it and with what, and lists the pull requests behind it, so you can check it yourself.
What it does not do
AI does not decide what the project is. People set the goals, review what lands, and answer for it. Every accepted function is reproducible from the public toolchain, so anyone can check the work without trusting the tool that helped write it.
Our rules
Plain, readable C only, with no tricks to force a match. No game assets or dumps are fed to any tool in a way that would end up in the repository. Contributors are welcome to use or avoid AI as they choose, and are responsible for what they submit either way.
Why we are open about it
Preservation work depends on trust. Saying how the work is done, and making it verifiable, lets people judge it on the evidence. We would rather explain a tool than have anyone wonder about it.
Legal
OpenRAC is an independent, unofficial fan project. It is not affiliated with, endorsed by or sponsored by the owners of the games or their publishers. "Ratchet & Clank" and related names, characters and logos are trademarks of their respective owners and are used here only to identify the games this project studies.
The source of this website contains no copyrighted game assets, no game code and no game binaries, and neither do the decompilation repositories it links to. A legally obtained copy of the game is required to use any tool from those projects. See LEGAL.md in the repository for details.