# OpenBattlespire: reimplementing the Battlespire engine

> OpenBattlespire reimplements the engine of An Elder Scrolls Legend: Battlespire in C and reads the user’s original game files at runtime. Its source includes game systems, format parsers and data tools; research notes analyze GAME.EXE and document BSA, BS6, save and other formats. The README describes playable movement, combat, dialogue and save behavior.

- 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/SapphireDragoness/open-battlespire>
- Primary source: <https://github.com/SapphireDragoness/open-battlespire/blob/6653df9ffe402f7b491f61d2bb31b20068632ec3/README.md>
- Catalog page: <https://awesomerea.org/resources/openbattlespire-case/>
- Record JSON: <https://awesomerea.org/resources/openbattlespire-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/openbattlespire-case/index.md)

## Requirements & limits

- **Prerequisites:** A user-owned copy of Battlespire is required for game data.
- **Prerequisites:** Building requires CMake 3.25+ and a C17 compiler; the viewer also needs SDL3 3.2+ and OpenGL 3.3.
- **License:** MIT.

## Primary sources

1. <https://github.com/SapphireDragoness/open-battlespire/blob/6653df9ffe402f7b491f61d2bb31b20068632ec3/README.md>
2. <https://github.com/SapphireDragoness/open-battlespire/blob/6653df9ffe402f7b491f61d2bb31b20068632ec3/docs/re/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.