Free & Open Source Strategy Games
341 free, open-source strategy games — real clones and remakes you can download, inspect the source of, and modify. Not just free to play: the code itself is open.
Archived
Clone of Command & Conquer: Red Alert
Electronic Arts' official open-source Red Alert engine and code, paired with a Steam re-release bundling the base game and both expansions.
Platforms:Windows
Stars6,702
Updated1 year ago
LicenseGPL3*
Release2024
Genre: Real-Time Strategy
Theme: Modern Military
Archived
Clone of Command & Conquer: Generals
Electronic Arts' official open-source Zero Hour engine and code, paired with a Steam re-release adding Workshop support for community maps.
Platforms:Windows
Stars4,721
Updated1 year ago
LicenseGPL3*
Release2024
Genre: Real-Time Strategy
Theme: Sci-Fi
Archived
Clone of Command & Conquer
Electronic Arts' official open-source release of the Tiberian Dawn engine, paired with a Steam re-release of the campaigns.
Platforms:Windows
Stars1,808
Updated1 year ago
LicenseGPL3*
Release2024
Genre: Real-Time Strategy
Theme: Modern Military
Halted
Clone of Advance Wars
Tanks of Freedom is an open-source isometric pixel-art turn-based strategy game built in Godot Engine, with a released sequel.
Platforms:WindowsLinuxOSX
Stars1,208
Updated1 year ago
LicenseMIT*
Release2015
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Perimeter
KD Lab's own official open-source release of the Perimeter engine, paired with a Steam re-release; online play works via LAN or GameRanger.
Platforms:Windows
Stars552
Updated14 days ago
LicenseGPL-3.0
Release2021
Genre: Real-Time Strategy
Theme: Sci-Fi
Halted
Clone of Master of Orion
Remnants of the Precursors is a modernization of Master of Orion, leading one of ten races to galactic domination with streamlined play.
Platforms:WindowsLinuxOSX
Stars221
Updated3 years ago
LicenseCC-BY-NC-ND, GPL3*
Release2020
Genre: Turn-Based Strategy
Theme: Sci-Fi
Active
Archived
Clone of Command & Conquer
Electronic Arts' official source release for the C&C Remastered Collection, supporting Steam Workshop maps and mods for the 4K remaster.
Platforms:Windows
Stars21,391
Updated1 year ago
LicenseUnknown
Release2020
Genre: Real-Time Strategy
Theme: Modern Military
Active
Clone of Command & Conquer
An open-source RTS engine that reimagines Red Alert, Tiberian Dawn and Dune 2000, with online multiplayer and modding tools.
Platforms:WindowsLinuxOSX
Stars17,376
Updated12 days ago
LicenseGPL-3.0
Release2010
Genre: Real-Time Strategy
Theme: Modern Military
Active
Clone of RollerCoaster Tycoon
An open-source re-implementation of RollerCoaster Tycoon 2 with modern platform support, higher limits and co-op multiplayer.
Platforms:WindowsLinuxOSX
Stars16,227
Updated11 days ago
LicenseGPL-3.0
Release2014
Genre: Simulation
Theme: Management
Active
Clone of Age of Empires
A free engine clone of Age of Empires' Genie Engine; it needs the original game assets, and gameplay is being rebuilt.
Platforms:Linux
Stars14,432
Updated12 days ago
LicenseUnknown
Release2013
Genre: Real-Time Strategy
Theme: Ancient History
Active
Clone of Civilization V
An open source, moddable remake of Civilization V for Android and desktop, using no original game assets.
Platforms:WindowsLinuxOSX
Stars11,279
Updated11 days ago
LicenseMPL-2.0
Release2017
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Transport Tycoon
A free, actively developed remake and expansion of Transport Tycoon Deluxe with multiplayer and in-game mod downloads.
Platforms:WindowsLinuxOSX
Stars8,264
Updated11 days ago
LicenseUnknown
Release2018
Genre: Strategy
Theme: Management
Active
Clone of Master of Monsters
The Battle for Wesnoth is an open-source, turn-based tactical strategy game with a high-fantasy setting and singleplayer campaigns.
Platforms:WindowsLinuxOSX
Stars6,876
Updated11 days ago
LicenseGPL-2.0
Release2013
Genre: Turn-Based Strategy
Theme: Fantasy
Active
Clone of Heroes of Might and Magic III
An open-source recreation of the Heroes of Might and Magic III engine with new features, full mod support, and mobile ports.
Platforms:WindowsLinuxOSX
Stars5,863
Updated13 days ago
LicenseGPL-2.0
Release2014
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Theme Hospital
CorsixTH is a reimplementation of Theme Hospital for modern systems, adding 4K support, a map editor, and 20+ language translations.
Platforms:WindowsLinuxOSX
Stars4,558
Updated11 days ago
LicenseUnknown
Release2013
Genre: Strategy
Theme: Management
Active
Clone of Total Annihilation
Beyond All Reason is an open-source real-time strategy game built on the Recoil engine, combining a lobby launcher with Lua-based game code.
Platforms:WindowsLinux
Stars4,207
Updated11 days ago
LicenseUnknown
Release2019
Genre: Real-Time Strategy
Theme: Sci-Fi
Halted
Clone of Total Annihilation
An open-source real-time strategy engine descended from Total Annihilation, for Windows, Linux, and macOS.
Platforms:WindowsLinuxOSX
Stars3,997
Updated2 years ago
LicenseUnknown
Release2008
Genre: Real-Time Strategy
Theme: Sci-Fi
Active
Halted
Halted
Clone of Plants vs. Zombies
PythonPlantsVsZombies is a Python and Pygame recreation of Plants vs. Zombies with a subset of its plants and zombies.
Active
Clone of Spore
An open-source evolution sim where you guide a species from a single cell through mutation-driven natural selection.
Platforms:Windows
Stars3,706
Updated11 days ago
LicenseUnknown
Release2012
Genre: Simulation
Theme: Sci-Fi
Active
Clone of Heroes of Might and Magic II
fheroes2 is an open-source, from-scratch recreation of the Heroes of Might and Magic II engine, with high-resolution graphics and better AI.
Platforms:WindowsLinuxOSX
Stars3,479
Updated11 days ago
LicenseGPL-2.0
Release2019
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Caesar III
Julius is an open-source reimplementation of Caesar III reproducing the original's logic and save compatibility, with widescreen support.
Platforms:WebWindowsLinux
Stars3,375
Updated14 days ago
LicenseAGPL-3.0
Release2017
Genre: Simulation
Theme: Management
Active
Clone of The Settlers II
Widelands is a free, open-source RTS inspired by The Settlers II, with singleplayer campaigns, multiplayer, and Lua-scripted scenarios.
Platforms:WindowsLinuxOSX
Stars3,061
Updated11 days ago
LicenseGPL-2.0
Release2019
Genre: Real-Time Strategy
Theme: Medieval
Active
Clone of Pajama Sam: Games to Play on Any Day
An open-source engine reimplementation that lets classic point-and-click adventures and RPGs run on modern platforms.
Active
Clone of Magic: The Gathering
Forge is an open-source rules engine for Magic: The Gathering with Adventure mode and AI-opponent Draft, Commander, and Cube formats.
Platforms:WindowsLinuxOSX
Stars2,698
Updated11 days ago
LicenseGPL-3.0
Release2022
Genre: Card Game
Theme: Fantasy
Active
Clone of Dwarf Fortress
An open-source GPLv3 action-adventure RPG inspired by Cube World, Dwarf Fortress, and Minecraft.
Sporadic
Clone of X-COM: UFO Defense
A playable open-source clone of UFO: Enemy Unknown and Terror from the Deep with extensive mod support.
Sporadic
Clone of Civilization II
A browser-based, turn-based empire-building strategy game built on the Freeciv C server, with 2D and 3D WebGL clients.
Platforms:Web
Stars2,199
Updated6 months ago
LicenseUnknown
Release2013
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Caesar III
A fork of the Julius Caesar III re-implementation adding new customizable gameplay, actively developed for Windows, Linux, macOS, and more.
Platforms:Web
Stars2,082
Updated13 days ago
LicenseAGPL-3.0
Release2020
Genre: Simulation
Theme: Management
Active
Clone of Athena Crisis
Athena Crisis is an MIT-licensed turn-based strategy game whose core code — engine, AI, rendering, and map editor — is open-core.
Platforms:Web
Stars1,981
Updated20 days ago
LicenseUnknown
Release2024
Genre: Turn-Based Tactics
Theme: Sci-Fi
Active
Clone of Chris Sawyer's Locomotion
A complete C++ re-implementation of Chris Sawyer's Locomotion, aiming to improve it the way OpenTTD improved Transport Tycoon.
Platforms:WindowsLinuxOSX
Stars1,904
Updated12 days ago
LicenseMIT
Release2018
Genre: Strategy
Theme: Management
Active
Clone of Heroes of Might and Magic III
A browser-based, turn-based tactical strategy game played online in 1v1 or 2v2 matches with creatures that have unique abilities.
Platforms:Web
Stars1,873
Updated1 month ago
LicenseAGPL-3.0
Release2011
Genre: Turn-Based Strategy
Theme: —
Active
Sporadic
Clone of Command & Conquer: Generals
An early-stage, not-yet-playable open-source re-implementation of EA's SAGE engine, targeting C&C: Generals and Zero Hour.
Platforms:WindowsLinuxOSX
Stars1,635
Updated6 months ago
LicenseUnknown
Release2017
Genre: Real-Time Strategy
Theme: Sci-Fi
Active
Clone of Civilization II
An open-source, GPLv2-licensed empire-building strategy game inspired by the history of human civilization, for Windows and Linux.
Platforms:WindowsLinux
Stars1,596
Updated11 days ago
LicenseGPL-2.0
Release2017
Genre: Turn-Based Strategy
Theme: —
Active
Clone of Black & White
An open-source C++ reimplementation of Lionhead's Black & White that runs on the original game's assets.
Platforms:WebWindowsLinux
Stars1,560
Updated1 month ago
LicenseGPL-3.0
Release2018
Genre: Simulation
Theme: Fantasy
Halted
Clone of Star Ruler 2
A massive-scale 4X/RTS set in space, officially open-sourced by original developer Blind Mind Studios.
Platforms:WindowsLinux
Stars1,528
Updated2 years ago
LicenseUnknown
Release2018
Genre: Real-Time Strategy
Theme: Sci-Fi