The patch that replaces GameSpy with Steamworks for multiplayer functionality is now available via Steam. The game functions identically to the previous GameSpy version with the exception that the “Direct IP” option has been removed as it is no longer supported. Save game data should not be negatively affected. If you own a physical disc version of Civilization IV and are interested in receiving this multiplayer update, please submit a support request. http://support.2k.com/requests/new