i currently play the game on an Xbox one but am thinking about moving across to the pc platform. Main reason is all the available extra cars and tracks plus the ability to map more buttons on the wheels etc. I believe I will have to buy the game through steam? I have seen companies selling steam keys for the game. Not sure how this works, if I buy the licence key how do I get the game? I also discovered a site that offers addons such as cars, tracks etc. Can these be used with the official steam game?