It says "could not contact master game server to retrieve server list"

[Ironical]

And I am using ethernet and wifi, is that the problem?

[Mandrake]

No, the master game server was taken down years ago. Instead of trying to find servers ingame, use the Steam client instead: http://steamcommunity.com/sharedfiles/filedetails/?id=135538998

[Kustodrocher]

♥♥♥