As of , Counter-Strike 1.5 cannot be purchased as a new standalone product from official digital storefronts.
: When Valve launched Steam, players with retail keys could "register" them to upgrade to Counter-Strike 1.6 for free. Most valid retail keys from that era have already been claimed and used. Current Availability counter strike 15 cd key new
Сообщество Steam :: Руководство :: How to play Counter-Strike 1.5 As of , Counter-Strike 1