Counter-Strike 1.3 was released in September 2001. It is no longer officially sold or supported by Valve. To play it today, you must use third-party archive sites or legacy launchers.
Internet Archive: You can find a PC dump of Half-Life: Counter-Strike (Version 1.3) which includes the ISO image from the original CD. half life counter strike download 1.3
Additional Tips and Tricks
Half-Life Counter-Strike Download 1.3