So I am a bit confused as to what we can actually do 'on' a planet? Like will all planets that are habitable be accessible for 1st person exploration on the ground or will there just be settlements and a town hub where you trade/socialise? Next will the 1st person shooting be tied to just random PvP games or will it be more to do with exploring abandoned space stations and other space junk (I presume would be randomly generated)?