# Re-Comprehend: rebuilding Penguin Software adventure engines

> Re-Comprehend reimplements the Comprehend and Graphics Magician engines for Penguin Software adventures including Transylvania, Crimson Crown and OO-Topos. It reads the user's original DOS game files, preserves the original save format, and offers data dumps and runtime commands for inspecting objects, rooms and state.

- 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/RyanMallon/recomprehend>
- Primary source: <https://github.com/RyanMallon/recomprehend/blob/6cee72636a29b8d0a8a57ad2ef60281ca73b3597/README.md>
- Catalog page: <https://awesomerea.org/resources/re-comprehend-case/>
- Record JSON: <https://awesomerea.org/resources/re-comprehend-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/re-comprehend-case/index.md)

## Requirements & limits

- **Prerequisites:** A copy of the original DOS game and LibSDL2.
- **Testing evidence:** Builds have been tested only on Linux.
- **Limits:** Talisman is not currently working; some opcodes and graphics features remain incomplete.
- **License:** CC0-1.0 dedication.

## Primary sources

1. <https://github.com/RyanMallon/recomprehend/blob/6cee72636a29b8d0a8a57ad2ef60281ca73b3597/README.md>
2. <https://github.com/RyanMallon/recomprehend/blob/6cee72636a29b8d0a8a57ad2ef60281ca73b3597/BUGS.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.