# OpenIGI: a C# engine reimplementation for Project I.G.I. and I.G.I. 2

> OpenIGI reimplements the engine for Project I.G.I. and I.G.I. 2 in C# on .NET 10, reading missions, scripts and assets from the user's retail installations. It runs the games' QVM scripts in a reconstructed interpreter and provides a native renderer, launcher and modding layer. The author reports all 14 first-game missions playable, while I.G.I. 2 remains in development.

- 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/OpenIGI/OpenIGI>
- Primary source: <https://github.com/OpenIGI/OpenIGI/blob/ed97501fbd46092818f95cedf2b073f783107636/README.md>
- Catalog page: <https://awesomerea.org/resources/openigi-engine-case/>
- Record JSON: <https://awesomerea.org/resources/openigi-engine-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/openigi-engine-case/index.md)

## Requirements & limits

- **Prerequisites:** Provide a retail installation of the relevant I.G.I. game; the repository contains no original game assets.
- **Prerequisites:** The .NET 10 SDK is required to build from source.
- **Limits:** I.G.I. 2 is still in development and has no released build; multiplayer is unavailable.
- **License:** GPL-3.0 licence.

## Primary sources

1. <https://github.com/OpenIGI/OpenIGI/blob/ed97501fbd46092818f95cedf2b073f783107636/README.md>

## More in Games

- [OpenInsaniquarium: reimplementing Insaniquarium Deluxe](https://awesomerea.org/resources/openinsaniquarium-case/index.md) · Case study
- [OpenJazz: a Jazz Jackrabbit 1 engine reimplementation](https://awesomerea.org/resources/openjazz-case/index.md) · Case study
- [OpenJKDF2: C reimplementation of Jedi Knight: Dark Forces II](https://awesomerea.org/resources/openjkdf2/index.md) · Case study
- [OpenJones3D: reconstructing the Indiana Jones and the Infernal Machine engine](https://awesomerea.org/resources/openjones3d-case/index.md) · Case study
- [OpenJPB: rebuilding Jedi Power Battles for PC](https://awesomerea.org/resources/openjpb-case/index.md) · Case study
- [OpenKeeper: a Dungeon Keeper II game and engine remake](https://awesomerea.org/resources/openkeeper-dungeon-keeper-ii-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.