Multiplayer Games in Windows and Windows Phone store

When Microsoft was demonstrating Windows 8 prior to release, they over and over reiterated the potential for cross platform multiplayer play between Windows Phone and Windows 8. A year on, and only one game that I am aware of has taken advantage of this, Galatic Reign, which was quickly discontinued shortly after release.

Perhaps its just my poor search skills, but Are there any multiplayer cross platforms out there ? or any games in the Windows store for that matter ( Windows 8 Store) which are multiplayer over a LAN or the Internet ( and I don't consider games like wonderment to be multiplayer)