R8000P has freeciv service and port 5555 TCP port open?

[SilentVoid]

A quick port scan of my R8000P router found a service named "freeciv" using TCP port 5555 - is this expected?  As part of the scan, it did also find ftp (21/tcp), domain (53/tcp), http (80/tcp), https (443/tcp), upnp (5000/tcp) which were expected.  

[FURRYe38]

Have you looked up to see what freeciv is? 
Seems to be a online game. Anyone playing this game on your network?