# Castlevania 64: matching USA v1.0 overlays

> Castlevania 64 - Overlays Decompilation reconstructs selected code overlays from the USA v1.0 Nintendo 64 game as C source. Its Ubuntu build uses IDO 7.1 and nOVL, then checks each generated overlay's SHA-1 against the decompressed original.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/moisesPC/cv64_overlays_decomp>
- Primary source: <https://github.com/moisesPC/cv64_overlays_decomp/blob/0f32f26073fce504b7813a1b5eeb2bcf1091e9a2/README.md>
- Catalog page: <https://awesomerea.org/resources/cv64-overlays-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/cv64-overlays-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/cv64-overlays-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Ubuntu build with IDO 7.1, nOVL and mips64-ld.
- **Limits:** The repository is marked outdated in favor of a newer decompilation project.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/moisesPC/cv64_overlays_decomp/blob/0f32f26073fce504b7813a1b5eeb2bcf1091e9a2/README.md>

## More in Games

- [Castlevania: Aria of Sorrow — matching decompilation of the GBA game](https://awesomerea.org/resources/cvaos-decomp/index.md) · Case study
- [Castlevania: Symphony of the Night: matching decompilation across PlayStation, PSP and Saturn builds](https://awesomerea.org/resources/sotn-matching-decomp-case/index.md) · Case study
- [Chameleon Twist: an in-progress Japanese N64 decompilation](https://awesomerea.org/resources/chameleon-twist-jp-decomp-case/index.md) · Case study
- [Champions of Norrath: matching PS2 function reconstruction](https://awesomerea.org/resources/champions-of-norrath-decomp-case/index.md) · Case study
- [Champions: Return to Arms: byte-matched PS2 function reconstruction](https://awesomerea.org/resources/champions-return-to-arms-ps2-case/index.md) · Case study
- [Chibi-Robo: PIA: matching GameCube DOL decompilation](https://awesomerea.org/resources/chibi-robo-pia-decomp-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.