Each of the religious traditions is both host and guest in relation to the others — sometimes more in host mode and sometimes more in guest mode. (religion-online.org)
You just have to start a single player game and then go into the settings to enable multiplayer host mode. (androidauthority.com)
The Nexus unfortunately doesn't support USB Host mode out of the box, but it will support it if you're willing to root and use an app like Stickmount. (dearauthor.com)