Counter-Strike 1.1 is considered "Abandonware" or legacy software, so maps are primarily hosted on community-driven databases:

In 1999/2000, "downloading a map" was an adventure. You didn't have the Steam Workshop. You had third-party sites like FilePlanet, GameSpy, or fan-run .txt file repositories. You waited in queues for a file that was only a few megabytes.

Once you have downloaded a .bsp file (the map file), the installation process is simple but varies by platform:

: Navigate to your installation folder, typically found at: C:\Program Files\Half-Life\cstrike\ (for retail versions)

: A staple for sniper practice, using a large open middle ground with several platforms for long-range duels.

Downloading maps for CS 1.1 is an exercise in nostalgia. The version featured several maps that are now considered "forgotten," such as cs_thunder de_rotterdam