Free & Open Source World War II Games
27 free, open-source world war ii games — real clones and remakes you can download, inspect the source of, and modify.
Active
Clone of War Thunder
Dagor Engine is Gaijin Entertainment's official open-source release of the engine behind War Thunder, with a full build toolkit.
Platforms:Windows
Stars2,962
Updated1 month ago
LicenseUnknown
Release2023
Genre: Action
Theme: Modern Military
Halted
Clone of Ace of Spades
An open-source, cross-platform client for Ace of Spades 0.75 that connects to vanilla, pyspades and pysnip servers.
Platforms:WindowsOSX
Stars1,245
Updated2 years ago
LicenseGPL-3.0
Release2013
Genre: FPS
Theme: World War II
Sporadic
Halted
Active
Clone of Wolfenstein: Enemy Territory
An open-source continuation of Wolfenstein: Enemy Territory with a modernized, compatible engine plus a feature-adding Legacy mod.
Platforms:WindowsLinuxOSX
Stars718
Updated12 days ago
LicenseGPL-3.0
Release2020
Genre: FPS
Theme: World War II
Halted
Halted
Halted
Halted
Clone of Blitzkrieg
The official 2025 release of Blitzkrieg's singleplayer source code by Nival, under a non-commercial license, needing third-party SDKs.
Platforms:Windows
Stars325
Updated1 year ago
LicenseUnknown
Release2025
Genre: Real-Time Tactics
Theme: World War II
Sporadic
Clone of Blitzkrieg 2
Nival's official 2025 source release of Blitzkrieg 2's C++ engine and assets, under a non-commercial community license.
Platforms:Windows
Stars311
Updated1 year ago
LicenseUnknown
Release2025
Genre: Real-Time Tactics
Theme: World War II
Halted
Clone of Ace of Spades
An open-source reimplementation of the classic "voxlap" Ace of Spades, built without original code, for low-end systems.
Platforms:WindowsLinux
Stars281
Updated1 year ago
LicenseGPL-3.0
Release2016
Genre: FPS
Theme: World War II
Active
Clone of Company of Heroes 2
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
Active
Clone of The Great Escape
A portable C reimplementation of The Great Escape, reverse-engineered from Z80 assembly to run on macOS, Windows, and RISC OS.
Platforms:WindowsLinuxOSX
Stars132
Updated1 month ago
LicenseUnknown
Release2014
Genre: Arcade
Theme: World War II
Halted
Clone of Ace of Spades
Iceball is an open-source, extensible engine and game built on the classic Ace of Spades experience, for Windows, Linux, and macOS.
Platforms:WindowsLinuxOSX
Stars118
Updated5 years ago
LicenseGPL-3.0
Release2012
Genre: FPS
Theme: World War II
Halted
Sporadic
Halted
Sporadic
Sporadic
Clone of Eastern Front (1941)
A from-scratch TypeScript port of Eastern Front 1941, built from disassembled originals, running client-side as a single-page web app.
Platforms:Web
Stars15
Updated8 months ago
LicenseMIT
Release2022
Genre: Turn-Based Strategy
Theme: World War II
Active
Halted
Clone of World War II In Western Europe
The preserved original DOS source code for W.R. Hutsell's Second World War strategy wargame, kept unedited for history.
