
A genre-defining classic, rebuilt. Arma: Cold War Assault Remastered Demo brings the 2001 original's engine to modern 64-bit Windows & Linux. Free, open-source, and doubling as an official asset pack for your own Arma missions and mods.
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A free, modernized rebuild of the engine that started it all - and an open toolbox for the community that kept it alive.
Twenty-five years ago, Arma: Cold War Assault put you on the windswept islands of Everon, Malden and Kolguyev and let you fight a cold war that never quite stayed cold. This is that game's original "Poseidon" engine, brought into the present: rebuilt in modern C++, configured with CMake and Clang, and running natively on both Windows and Linux (64-bit).
This release is free, and it is two things at once.
A self-contained slice of Cold War Assault you can download and play right now - the classic open-world sandbox, vehicles, AI and mission system that defined a genre, running on a clean, modern codebase.
The demo doubles as a sanctioned asset pack for the Arma community. The bundled game data is provided as raw material you are free to study, modify and build new Arma content from. If you have ever wanted to learn how a Bohemia game is put together, or wanted clean reference assets to start a mod, this is for you.
The full engine source code is available on GitHub — search for BohemiaInteractive/cwr
Clone it, build it, study it, and send pull requests. Licensing, developer documentation and the scripting reference all live in the repository.
Play the demo, free of charge.
Use the bundled assets to create new missions, mods and content for Arma.
Build the engine yourself on Windows or Linux from the public source.
Adapt, remix and share your work with the rest of the community.
The engine source on GitHub is published under its own license - see the repository's LICENSE file and notices for details.