You would need to buy it on ps4 to play it there. Expansions (Forsaken/Shadowkeep) do not transfer and must be purchased on each platform you wish to play them on. [quote][b]Do my previous game purchases transfer across platforms?[/b] [url=https://www.bungie.net/7/en/CrossSave]No. The things you have purchased from your PC or Console stores will remain on the platforms where you bought them. These includes games or balances of Silver. Cross Save enables you to access the Guardians and Collections on one Active Account from wherever you play. The things that you acquire for your characters in the game are what move with you from one platform to another.[/url][/quote]