I purchased Original Sin: Enhanced Edition via Steam specifically because it advertises I can play cooperatively with my friends on Xbox One if I'm on Windows10. Steam also lists the game as supporting cross-platform play, thus it bolstered my decision to buy on PC.
Currently Cross-platform play is a lie. There is no option for cross-platform gameplay. Windows10/Steam only sees Steam games, and my copy on Xbox One only sees Xbox One games.
Larian Studios, can you please comment on the state of cross-platform play and let us know if this will be addressed?
Otherwise I feel lied to and my money ill-spent on 2 different copies. :(