# OpenDana: a C11 reimplementation of Solomon's Key 2

> OpenDana reimplements the NES puzzle game Solomon's Key 2 / Fire 'n Ice with a deterministic C11 core and SDL2 front end. It imports levels, graphics, text and audio from the user's European ROM and adds a level editor, save states and JSON/PNG mods.

- 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/dvilelaf/opendana>
- Primary source: <https://github.com/dvilelaf/opendana/blob/51a9faae4a4450c71da2889a2294620ad2e575d4/README.md>
- Catalog page: <https://awesomerea.org/resources/opendana-case/>
- Record JSON: <https://awesomerea.org/resources/opendana-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/opendana-case/index.md)

## Requirements & limits

- **Prerequisites:** A legally obtained European Solomon's Key 2 ROM matching the documented SHA-256 is required for first import.
- **Prerequisites:** Source builds require a C11 compiler, CMake 3.16 or later and SDL2 development files.
- **Testing evidence:** The macOS arm64 package is compiled but has not been run on Apple Silicon.
- **License:** GPL-3.0-or-later licence.

## Primary sources

1. <https://github.com/dvilelaf/opendana/blob/51a9faae4a4450c71da2889a2294620ad2e575d4/README.md>

## More in Games

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- [openDarkEngine: rebuilding support for Dark Engine game data](https://awesomerea.org/resources/opendarkengine-case/index.md) · Case study
- [OpenDeathValley: Desperados file readers and script disassembly](https://awesomerea.org/resources/opendeathvalley-case/index.md) · Case study
- [OpenDF: a Daggerfall engine reconstruction](https://awesomerea.org/resources/opendf-case/index.md) · Case study
- [OpenDiablo2: Diablo 2 engine reimplementation](https://awesomerea.org/resources/opendiablo2/index.md) · Case study
- [OpenDrakan: reconstructing Drakan's Riot Engine](https://awesomerea.org/resources/opendrakan-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.