This new standalone package containing the multiplayer part of the game has been denominated F.E.A.R. Combat, and will include all the updates, additional official maps and official game modes all in one downloadable file.
F.E.A.R. Combat features: 10 Multiplayer Game modes, 19 Multiplayer Maps, 12 different weapons, Punkbuster support or anti cheat support, the capability to download user generated content.
F.E.A.R. Combat will be available for download on August 17th. Users wanting to play the game need to register on the official website first. And in case you were wondering, Combat players will be able to join those owning the full retail game as they are fully compatible. (Thanks to luvhuffer on the forums for pointing this out).