About
Falcon 4.0 is a combat flight simulator originally published by Microprose. FreeFalcon is a campaign-based, multiplayer, open-source flight simulator that began as a mod of the original Falcon 4.0 and has since gone fully open source. It's built with Visual Studio and the Windows SDK/DirectX and includes an installer built with the WiX Toolset.
Getting started
Compiling requires Visual Studio, the Windows SDK, DirectX, and OpenXR headers installed via NuGet; running it in Debug mode requires pointing the project's working directory at an existing FreeFalcon installation.
History
FreeFalcon's licensing was historically unclear, having started as a fan mod of Falcon 4.0; the project states that with its move to the liberal BSD 2-clause license, it is 'truly free' for the first time in its history.