Civilization III (OpenCiv3)
Game: Sid Meier's Civilization III (Windows, 2001)
OpenCiv3 (formerly known by its codename, C7): an open-source remake of Civilization III by the fan community, built with the Godot engine and C#, with Lua for the game rules. It describes itself as a mechanically compatible black-box reimplementation: it rebuilds the gameplay with its own code and community-made art, based on public information and on observing the game, ships nothing from Civilization III, and can load the art from your own install to look closer to the original. Its goal is a game that looks and plays like Civ3 and its Conquests expansion, but without its arbitrary limits, with broken features fixed, and much more open to modding. It reads Civ3 BIQ and SAV files, though support for scenarios and saves is incomplete. The project is in pre-alpha: it’s playable, but many mechanics and the late-game content are missing. The latest release, 0.3 “Dutch” Preview 1 (December 7, 2025), introduced a standalone mode with placeholder graphics that doesn’t need the Civ3 files, with builds for Windows, Linux, and macOS. Development continues: in October it added the logic for wonders and conquest and domination victories.
You needRecommended: the files from your own copy of Civilization III with Conquests or the Complete edition (the game itself doesn’t have to run); on Windows it finds them through the registry, and on Linux and macOS you point to them with the CIV3_HOME variable. Without them, standalone mode uses placeholder graphics. Plus 64-bit Windows, x86-64 Linux, or macOS (Intel or Apple silicon).
- How it gets to PC
- Fan reimplementation
- Console
- Microsoft Windows
- Original studio
- Firaxis Games
- Year
- 2001
- Author
- C7-Game
- Stars
- 693
- Last activity
- 2026-11-09 · 2 days ago
- Latest version
- v0.3-dutch-2 · 2026-10-31
- License
- MIT
- Language
- C#
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