Your account may still be used to play single-player games and multiplayer games on insecure servers
Your account may still be used to play single-player games or to connect to insecure game servers and for games played over a LAN. To find insecure servers, please change your filter settings in the server browser list to show servers which are not VAC-secured (from the Steam main menu go to the View option, select Servers and then select "Not secure" in the Anti-Cheat drop-down).
NOTE: Some VAC secured games like the Call of Duty series do not have insecure servers.