Steam vs Consoles (Xbox/Microsoft and PS4 )
ARK is available on multiple platforms, but there seems to be a lot of confusion about who can play together!!
As it stands right now (based on everything found on the web….. this is subject to change at any time), you can ONLY play with other players, if you meet the following conditions;
Steam Version -Windows, Steam-Linux and Steam-Mac. You “can” play together on a Steam based server.
PS4 Version – with other PS4 players or a special custom PC server, available from Studio Wildcard ‘selected’ hosting providers.
Microsoft/Xbox Version – with other Xbox players and/or those running the Windows 10 version of ARK (available in the Windows App store).
With this said…
PS4 players CANNOT play with Steam or Xbox/Microsoft players,
Xbox players CAN ONLY play with the Xbox/Microsoft versions of ARK (available on the Microsoft Store),
Steam players CAN ONLY play with other Steam version players/servers.