Errors ...

I get error when open game


CS:Classic Offensive requires Steam to be running in the background , if you get above error means you dont have Steam running in background and you tried to open from game folder. Open steam and open game from your library !

Your map differs from the server

Open Classic Offensive folder ➜ navigate to CSCO/csgo/maps ➜ delete the problematic map file ➜ reconnect to server.

STEAM validation rejected

If you get STEAM validation rejected , just close your Steam app and open again. This happen when you get kick by vote from players.