Arma: Cold War Assault - Remastered (codename Poseidon) is the engine
and game source code first released in 2001 as Operation Flashpoint:
Cold War Crisis. It is the codebase that launched Bohemia Interactive
and began the technology lineage later grown into Real Virtuality, Arma,
and Enfusion. The code has been modernized to C++20, built with CMake
and Clang.

Game assets (models, textures, sounds, missions, voices) are NOT
included with this port and are NOT GPL. They ship separately under the
Arma Public License Share Alike (APL-SA).
A free Demo is available on Steam:
https://store.steampowered.com/app/4819000
And this game was tested with the full GOG version game assets too.

Without game data the binaries do nothing useful at runtime.