For older versions of Counter-Strike (like 1.3), bots are not always included in the base "clean" install. PODbot (Ping of Death)

use a pre-patched version of the game or manually install a bot plugin like PodBot 2.5 , which was the standard for that era. 1. Getting the Game Files

After installation, navigate to: \cstrike\addons\metamod\plugins.ini – Confirm that “zbot” or “podbot_mm” is listed and not commented out.