More so than an MMOFPS, it's an MMORPG with third person action game styled combat. The main difference between this and most other MMORPG's coming out is that it's catering to the hardcore PVP croud. The vast majority of the world is supposed to be open PVP, you will drop your loot when you die, and excluding faction members, you wont be branded a murderer for killing other players.