# Gundam Code Fairy PS4RT for Windows

> DiamondDogz's Windows build of HekamiAeon's Gundam Code Fairy PS4RT runtime for the PS4 game, with the Sieg Zeon launcher and FSR 4 upscaling.

Web page: https://emulationking.com/sony/ps4/games/gundamcodefairy/ports/codefairyps4rtwindows/
Page updated: 2026-11-12

- Developer: [DiamondDogz](https://emulationking.com/authors/diamonddogz/index.md)
- Port type: Recompilation (A tool translated the game's original machine code into C automatically, which was then built as a native PC program.)
- Game: [Mobile Suit Gundam Battle Operation Code Fairy](https://emulationking.com/sony/ps4/games/gundamcodefairy/index.md)
- AI use: Mostly AI-built. The project says: “About 90% of the Windows port code was written with Grok.”
- Source code: /opt/buildhome/repo/content/sony/ps4/games/gundamcodefairy/ports/codefairyps4rtwindows/index.md
- Runs on: Windows

What you need: Your own extracted Mobile Suit Gundam Battle Operation Code Fairy PS4 game folder (`CUSA28763`), at 01.03 or at 01.00 with your own 01.03 update PKG, and your own three volume key PKGs in one folder. Windows 10 or 11 64-bit, a current Vulkan driver and Microsoft Edge WebView2.

Gundam Code Fairy PS4RT for Windows is DiamondDogz's Windows build of Gundam Code Fairy PS4RT, HekamiAeon's runtime that runs the PS4's Mobile Suit Gundam Battle Operation Code Fairy from the game's own x86-64 code with a Vulkan renderer derived from shadPS4. The runtime is HekamiAeon's work and the credit for it stays there; the Linux original is listed here as Gundam Code Fairy PS4RT. This build is the runtime's version 1.0 with the changes Windows needed to start it.

It adds Sieg Zeon, a launcher in English and French that sets up the game folder, installs the update and the three volume key packages, and holds the same graphics settings as the in-game menu. The publisher's screenshots show FSR 4 at 60 frames a second, and the runtime works with DiamondDogz's Crowbar, which can start it and records the trophies the game unlocks.

It is a pre-release: it starts the game and plays it, but needs more testing before a stable version. No game files, keys or firmware are included. The publisher says about 90% of the Windows code was written with Grok, and the rest with Claude.

## How to set it up

1. Download the zip and extract the whole folder.
2. Run `SiegZeon.exe`. It isn't code-signed, so Windows may warn: choose More info, then Run anyway.
3. Open Folders and choose the game folder, the update PKG if your game is 01.00, and the folder holding the three volume key PKGs. The launcher installs the update and keys itself.
4. Press play. In the game, Insert, or L2 and R3, opens the settings menu.

## Latest builds

Download these from the web page: https://emulationking.com/sony/ps4/games/gundamcodefairy/ports/codefairyps4rtwindows/#download

- for Windows: 1.0 (2026-11-12)