Yep, i own both DOOM 3 and DOOM 3 Resurrection of evil on steam, but whenever i check the servers list it seems .... empty, that's wierd because it worked just fine 2 days ago, i have no idea what's going on, to be honest i chosen to Buy Regular Doom 3 instead of BFG Edition because it's Multiplayer seemed more active, not very much but i was at least able to find some players from time to time, not to mention that it has more mods than BFG Edition

Is it happening only to me or everyone else is affected , please help !

Just checked gametracker and ...

I Just noticed the servers are still up, however when i tried to join them Manually it tells me "Client unknown to auth", what's that ?, does it have something to do with Master servers being down ? cause that's what most google results are saying