# mc4.sav: reconstructing the Midnight Club: Los Angeles save format

> mc4.sav documents the save format written by the Midnight Club: Los Angeles recompiled PC runtime. It maps big-endian section records, career values, garage slots and performance-upgrade bytes from observed saves, and supplies a browser editor and PowerShell commands for inspecting and changing supported fields.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/onlyzennnn/mcla-save-editor>
- Primary source: <https://github.com/onlyzennnn/mcla-save-editor/blob/356d055770997010f631f651d14b6f58d0abec0f/README.md>
- Catalog page: <https://awesomerea.org/resources/mcla-save-editor-case/>
- Record JSON: <https://awesomerea.org/resources/mcla-save-editor-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/mcla-save-editor-case/index.md)

## Requirements & limits

- **Prerequisites:** The tools expect a plain mc4.sav produced by the MC_LA_Recompiled runtime; Xbox 360 saves must first be extracted from STFS.
- **Prerequisites:** Close the game before editing; the tools reject files whose structure fails validation.
- **Limits:** Visual customization in garage slots has not been decoded.
- **License:** MIT License.

## Primary sources

1. <https://github.com/onlyzennnn/mcla-save-editor/blob/356d055770997010f631f651d14b6f58d0abec0f/README.md>

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## 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.