FF is a completely free to play source mod that feels like a healthy combination between tfc, and a more quake world like set of physics. It is very fast paced and centered largely around movement skill. We just had a patch drop today, and would love to have you come play with us.
All you need to do is download source sdk base 2006 (free) out of your tools tab in steam. And then download the game from the link provided above.
I do not own any of the music used here, which were used under fair use
The intro song is:
Green Bird - Seat Belts
Nobody - skindred
Air Plant - Yoko Kanno