The safest place to find community-maintained "Classic" versions and bot plugins. Archive.org:
If you are looking to relive the "Golden Age" of the early 2000s, downloading a version that includes bots is essential for offline practice or solo play. Free Download Counter Strike 1.3 With Bots
Later versions added tactical shields, riot gear, and other mechanics that many purists disliked. CS 1.3 is raw: you have your knife, your pistol, your primary, and your grenades. No gimmicks. Free Download Counter Strike 1.3 With Bots
When the menu loads, you should see the classic green background. Free Download Counter Strike 1.3 With Bots
Did this guide help you? Share your first CS 1.3 bot kill in the comments below. For more retro gaming guides, check out our articles on "Unreal Tournament GOTY" and "Age of Empires 2 LAN setup."