Planetside 1 is going free to play soon. And yes, before you mention the sequel, I realize PS2 is free to play also. Thing is, it's not really an mmo in the sense you are looking for. It's just BF/COD in a larger scale. Nothing sets it apart from your modern shooter we've seen for the past 5 years. PlanetSide 1 is more of an MMO in that you have character progression, no class system, higher TTK, unique weapons/vehicles and just an overall more community feel than I've ever had elsewhere. PS1 is more MMO/FPS/TPS/RTS/RPG.