Free & Open Source RTS Games
117 free, open-source rts games — real clones and remakes you can download, inspect the source of, and modify. Not just free to play: the code itself is open.
Active
Halted
Clone of Age of Empires II
freeaoe is a from-scratch, single-developer reimplementation of the Age of Empires II engine, still in early development.
Platforms:Windows
Stars237
Updated3 years ago
LicenseGPL-3.0
Release2019
Genre: Real-Time Strategy
Theme: Medieval
Halted
Active
Clone of Company of Heroes
A free, open-source WWII real-time strategy game for up to six factions, built on the Spring RTS Engine.
Platforms:WindowsLinux
Stars202
Updated1 month ago
LicenseUnknown
Release2013
Genre: Real-Time Strategy
Theme: World War II
Halted
Active
Clone of Knights and Merchants
A modernized remake of Knights and Merchants adding 12-player multiplayer, reworked AI, and scripting support for custom maps.
Platforms:WindowsLinuxOSX
Stars176
Updated11 days ago
LicenseAGPL-3.0
Release2016
Genre: Real-Time Strategy
Theme: Medieval
Archived
Sporadic
Clone of The Settlers
A C# port of Freeserf, an authentic remake of The Settlers I, requiring the original game's data files and adding new AI.
Platforms:WindowsLinux
Stars169
Updated3 months ago
LicenseGPL-3.0
Release2018
Genre: Real-Time Strategy
Theme: Medieval
Active
Clone of Stronghold
An actively developed, open-source isometric remake of Firefly Studios' Stronghold, built in the LÖVE engine.
Platforms:None
Stars166
Updated1 month ago
Licenseapache-2.0
Release2017
Genre: Real-Time Strategy
Theme: Medieval
Sporadic
Clone of StarCraft
A StarCraft remake built on the open-source Stratagus engine, requiring an existing StarCraft install for game data.
Platforms:WindowsLinuxOSX
Stars156
Updated9 months ago
LicenseGPL-2.0
Release2015
Genre: Real-Time Strategy
Theme: Sci-Fi
Sporadic
Clone of Dune 2
A cross-platform enhancement of Dune II built on OpenDUNE, adding widescreen graphics, multiplayer for up to 6, and fan campaigns.
Platforms:WindowsLinux
Stars154
Updated8 months ago
LicenseGPL-2.0
Release2023
Genre: Real-Time Strategy
Theme: Sci-Fi
Active
Clone of Warcraft: Orcs & Humans
An in-progress C remake of Warcraft: Orcs & Humans using the original game's assets, with core RTS features implemented.
Platforms:WindowsLinuxRaspberry Pi
Stars153
Updated1 month ago
LicenseZlib
Release2018
Genre: Real-Time Strategy
Theme: Fantasy
Archived
Active
Clone of Warcraft: Orcs & Humans
A Stratagus-engine reimplementation of Warcraft: Orcs & Humans with modern RTS conveniences, using the original's assets.
Platforms:WindowsLinuxOSX
Stars132
Updated3 months ago
LicenseGPL-2.0
Release2015
Genre: Real-Time Strategy
Theme: Fantasy
Halted
Active
Clone of Age of Empires
A from-scratch, cross-platform reimplementation of Age of Empires and Rise of Rome, requiring the player's own game copy.
Platforms:WindowsLinux
Stars128
Updated2 months ago
LicenseApache-2.0
Release2016
Genre: Real-Time Strategy
Theme: Ancient History
Sporadic
Clone of Krush, Kill 'n' Destroy
A semi-playable recreation of the KKnD real-time strategy games on the OpenRA engine.
Platforms:WindowsLinuxOSX
Stars126
Updated10 months ago
LicenseGPL-3.0
Release2018
Genre: Real-Time Strategy
Theme: Post-Apocalyptic
Halted
Clone of Swarm Assault
A near-complete Swarm Assault remake on the OpenRA engine, with all 100 missions, extra levels, multiplayer and a map editor.
Platforms:WindowsLinuxOSX
Stars123
Updated3 years ago
LicenseGPL-3.0
Release2019
Genre: Real-Time Strategy
Theme: —
Sporadic
Clone of Total Annihilation
An open-source RTS engine highly compatible with Total Annihilation's original data files.
Platforms:Windows
Stars123
Updated6 months ago
LicenseGPL-3.0
Release2017
Genre: Real-Time Strategy
Theme: Sci-Fi
Active
Active
Clone of Allegiance
Free Allegiance is an open-source project built with Visual Studio and DirectX, split into client, server, lobby, and logic components.
Archived
Clone of Warcraft: Orcs & Humans
A from-scratch, multiplatform port of Warcraft: Orcs & Humans using only the original art and level data; now archived.
Platforms:Windows
Stars80
Updated1 year ago
LicenseMIT
Release2015
Genre: Real-Time Strategy
Theme: Fantasy
Active
Clone of Dark Reign: The Future of War
A work-in-progress OpenRA mod recreating Auran's 1997 RTS Dark Reign, using content from the free demo.
Platforms:WindowsLinuxOSX
Stars75
Updated2 months ago
LicenseGPL-3.0
Release2018
Genre: Real-Time Strategy
Theme: Sci-Fi
Halted
Active
Clone of Earth 2140
A work-in-progress OpenRA-based remake of the 1997 RTS Earth 2140, now in multiplayer alpha.
Platforms:WindowsLinuxOSX
Stars71
Updated14 days ago
LicenseGPL-3.0
Release2022
Genre: Real-Time Strategy
Theme: Sci-Fi
Halted
Clone of Machines: Wired for War
Official GL-ported source code release of Machines: Wired For War, a 3D RTS, published with permission from Night Dive Studios.
Platforms:WindowsLinux
Stars68
Updated4 years ago
LicenseGPL-3.0
Release2020
Genre: Real-Time Strategy
Theme: Sci-Fi
Archived
Halted
Halted
Halted
Clone of Warcraft: Orcs & Humans
An unfinished Go engine for Warcraft: Orcs & Humans that decodes the original DOS game's resources.
Platforms:LinuxOSX
Stars58
Updated3 years ago
LicenseGPL-3.0
Release2016
Genre: Real-Time Strategy
Theme: Fantasy
Halted
Clone of Lego Rock Raiders
A JavaScript browser remake of the Lego-themed mining game Lego Rock Raiders, still in development.
Active
Clone of Emperor: Battle for Dune
CorrinoEngine is an open-source C# engine recreating Emperor: Battle for Dune from scratch; actively developed but still unplayable.
Platforms:Windows
Stars48
Updated2 months ago
LicenseGPL-3.0
Release2020
Genre: Real-Time Strategy
Theme: —
Active
Halted
Active
Clone of Tribal Trouble
A free, actively developed community revival of Tribal Trouble with 12-player online play, remastered graphics, and new features.
Platforms:WindowsLinuxOSX
Stars45
Updated11 days ago
LicenseGPL-2.0
Release2025
Genre: Real-Time Strategy
Theme: —
Halted
Halted
Halted
Halted