# Butterscotch: rebuilding the GameMaker: Studio runner

> Butterscotch reimplements the GameMaker: Studio runner in C so exported games can execute on additional platforms. It interprets GameMaker bytecode and documents support for WAD versions 8 through 17, with desktop, web, and console targets. Bytecode support remains in progress, and native-code YYC and GMRT games are outside its stated scope.

- 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/ButterscotchRunner/Butterscotch>
- Primary source: <https://github.com/ButterscotchRunner/Butterscotch/blob/16cc65199d28434680fa9327177299a39a5bfff4/README.md>
- Catalog page: <https://awesomerea.org/resources/butterscotch-case/>
- Record JSON: <https://awesomerea.org/resources/butterscotch-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/butterscotch-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires a compatible GameMaker: Studio game exported as bytecode; WAD versions 8 through 17 are listed.
- **Limits:** Bytecode support is still in progress; YYC, GMRT, and pre-WAD 8 games are unsupported.
- **License:** Licensed under AGPL-3.0.

## Primary sources

1. <https://github.com/ButterscotchRunner/Butterscotch/blob/16cc65199d28434680fa9327177299a39a5bfff4/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.