The game with the terrible/ingenious acronym F.E.A.R.: First Encounter Assault Recon launched in 2005. Since then, it has seen some expansions as well as two sequels. A while back, the original game's online component was even made free with F.E.A.R. Combat.
Regardless of that fact, we are now about to see the resurgence of the franchise with F.E.A.R. Online. Free-to-play baron Aeria Games are the ones behind it. There will be ten maps to play across in a handful of multiplayer modes. The "pay" portions of the game were not discussed.
Right now the title is in closed beta. You can just head over to Aeria's site to register for a place if you're interested. Of course, with such a wealth of F2P choices out it doesn't seem like there is much hurry to jump into a closed beta of one.
Here is the trailer promoting F.E.A.R. Online: