Welcome to csco.gg!
CSCO = Counter-Strike: Classic Offensive
Want to play CSCO?? I'm sure you do! Once you install CSCO following the readme in the .7z file, launch your console and type: connect servername:port
connect server.cyberdeath.net:27015 // Casual CSCO
connect server.cyberdeath.net:27016 // Deathmatch CSCO
Both servers are located in the United States East Region [Virginia]
If you are looking for more information on CSCO, check out the Mod DB page.