I have a similar situation I need an answer on but mine is little different. I have 3 players in same house and we each were free upgraded to ps4 edition from our ps3 copies. WE each have a pc copy as well. I plan to buy the expansion for pc x 3. I also because I need the software plan to buy is on ps4 x1. Do I still need the other ps4 copies or will just having the software installed on ps4 and the pc license be enough this go around?