FF is a single-player mod for Doom3:ROE aiming to bring the classic gameplay to the maximum. Lots of action, 10+ new big maps, new monsters, new weapons, new soundtrack, advanced AI, power-ups and a well-balanced gameplay that will push your skills to their limit. Add the ability to drive a vehicle and to fight as a demon in 3rd-person perspective and you get a good idea of what is waiting for you :D
This addon allows you to play an heavily-modified version of the ROE campaign in Fragging Free. It features coop sections with AI, new controllable monsters, revisited weapons, health and monsters placement.
See the readme for more info.