We added in our download area the latest version of Project Reality, a modification for the Battlefield 2 engine aimed to recreate a realistic combat environment (thanks: Trevor). This includes adjusting the game's various elements that include physics, visual effects and gameplay. As of v0.6, the Project Reality team is no longer freely distributing the server code. You will need to apply for a license, be granted a license and then you will be given a download link for the server code via PM on their forums.