Case study
SymphonyRecomp: a RecompOne static recompilation of Symphony of the Night
Statically recompiles the North American PlayStation release of Castlevania: Symphony of the Night into C# with BlackLabelHQ’s RecompOne, whose runtime simulates the BIOS, memory-mapped I/O, GPU and CD-ROM so the game runs natively without a console BIOS. Per-overlay function maps and patches add widescreen, quality-of-life, randomizer and cheat features. References from the SOTN decompilation help name functions, but the project stresses that it is a recompilation, not a decompilation.
- Targets
- Game
- Category
- Independent reconstruction cases
- Relationship
- Independent reconstruction project
- Sources reviewed
Requirements & limits
- Prerequisites: Requires the user’s own North American disc (serial SLUS-00067) as a two-track BIN/CUE set or CHD with fixed file names; other-language discs are described only as future sources for a language switcher. The repository contains no game data, and RecompOne needs no BIOS or other Sony components.
- Prerequisites: Release v0.5.1b (2026-08-19) ships Windows x64/ARM64, macOS ARM64/x64 and Linux x64 builds; Linux ARM64 was dropped in 0.5b. Source-build prerequisites list an OpenGL 2.1+ GPU, .NET 10, OpenAL and Git, and the changelog calls the OpenGL 2.1 path experimental with bitmasking problems. Game code is generated by running the RecompOne submodule against config/sotn.json.
- Limits: The README calls this an open beta that may contain game-breaking bugs, and 1.0 has not been released. No equivalence or automated gameplay test is published.
- License: SymphonyRecomp has no license file, so reuse terms are unspecified; the pinned RecompOne recompiler and runtime are MIT-licensed, and the game retains its own rights.
About this entry
The description was reviewed against primary sources.
Primary sources
- README.md GitHub · BlackLabelHQ/SymphonyRecomp · Revision c94a909
- config/sotn.json GitHub · BlackLabelHQ/SymphonyRecomp · Revision c94a909
- CHANGELOG.md GitHub · BlackLabelHQ/SymphonyRecomp · Revision c94a909
- .gitmodules GitHub · BlackLabelHQ/SymphonyRecomp · Revision c94a909
- patches GitHub · BlackLabelHQ/SymphonyRecomp · Revision c94a909
- README.md GitHub · BlackLabelHQ/RecompOne · Revision 3c34e6e
- LICENSE GitHub · BlackLabelHQ/RecompOne · Revision 3c34e6e
- https://github.com/BlackLabelHQ/SymphonyRecomp/releases/tag/v0.5.1b
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