# Um Jammer Lammy Recompiled

> Um Jammer Lammy Recompiled is a Windows playtest build kit that recompiles the European Um Jammer Lammy into a native program from your own disc.

Web page: https://emulationking.com/sony/ps1/games/umjammerlammy/ports/umjammerlammyrecompiled/
Page updated: 2026-09-30

- Developer: NJH-1001
- 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: [Um Jammer Lammy](https://emulationking.com/sony/ps1/games/umjammerlammy/index.md)
- AI use: Not stated
- Source code: https://github.com/NJH-1001/UmJamLamRecomp
- Runs on: Windows

What you need: Um Jammer Lammy (Europe, SCES-01753) as a Redump-style cue/bin disc image, dumped from your own disc.

Um Jammer Lammy Recompiled is a native port of Um Jammer Lammy for Windows, made by static recompilation with PSXRecomp. The download is a build kit: it generates the game code from your disc and compiles it on your PC, which can take several minutes.

It has lower audio latency for better rhythm timing, improved CD-XA audio, controller and WASD support, an optional 16:9 3D view, CRT display presets and an option that fades the retry-screen audio.

It is a playtest pre-release. The first stage, menus and controllers have been tested, but the author does not claim the game can be finished. The download contains no game data. It needs Um Jammer Lammy (Europe), dumped from your own disc.

## How to set it up

1. Download the Windows playtest zip and extract the whole zip to a writable folder outside `Program Files`.
2. Run `UmJammerLammy_Recompiled.exe` and select your European `.cue` file.
3. Choose **Generate & rebuild**. The setup can download the CMake, Ninja and Clang tools it needs, and the build can take several minutes.
4. Run `UmJammerLammy_Recompiled.exe` again once the build has finished.

## Latest builds

Download these from the web page: https://emulationking.com/sony/ps1/games/umjammerlammy/ports/umjammerlammyrecompiled/#download

- for Windows: 0.1.1 (2026-09-26)