[Baghi]

How the hell -nomaster parameter can do that? This is impossible, it's just another parameter like -console, -secure and such.

You don't have to put any setmaster manually, steam binaries can do it for you. I downgraded my "test" server from 5408 to 4382 and it worked just fine.

I did this for my Counter-Strike server: Except cstrike, platform, reslists and valve I deleted everything from my HLDS root directory and copied those binaries in the folder.