Diablo IV’s presence on Steam is in addition to Battle.net, Xbox Series X/S, Xbox One, PlayStation 5, and PlayStation 4, so wanderers playing the game on any existing platform need not make any changes. Those wanting to play on Steam will need to first purchase the game on that platform, then connect Diablo IV to a Battle.net account (as we require for all platforms). This enables cross-platform play and more. Players using Steam will have access to features specific to that platform, such as Steam achievements, their Steam friends list, and the option to invite those friends to play in-game. We’re looking forward to seeing more defenders of Sanctuary band together and welcome any feedback you may have.
Source:Â Diablo IV