Open-source Android/Desktop remake of Civ V
Civilization GitHub Repositories (2026) · Open Source Tools
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OpenCiv3 is an open-source, cross-platform, mod-oriented, modernized remake of Civilization III by the fan community built with the Godot Engine and C#, with capabilities inspired by the best of the 4X genre and lessons learned from modding Civ3.
FreeCol: FreeCol is a turn-based strategy game based on the old game Colonization, and similar to Civilization. The objective of the game is to create an independent nation.
Unofficial open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri ( + Alien Crossfire )
The Dawn of Civilization mod for Civilization IV: Beyond the Sword, based on the popular Rhye's and Fall of Civilization mod.
Civilization sandbox in your browser. Tribes invent their own languages, cultures and wars, from the stone age to computers. Built in Rust and WebAssembly, runs entirely on your device.