The most reliable and secure way to acquire these titles is through official digital storefronts. : You can purchase Counter-Strike: Condition Zero on Steam

Since January 2024, Steam only supports Windows 10 and later .

Enable the developer console in settings. Press the tilde key ( ~ ) and type fps_max 100 or fps_max 144 to match your monitor’s refresh rate.

Once you've downloaded Counter-Strike 1.6 Condition Zero, follow the installation instructions to install the game on your computer. After installation, you can launch the game and start playing.

Go to Options > Video. Set the Renderer to OpenGL (avoid Software or D3D). Set the resolution to your monitor’s native resolution (e.g., 1920x1080).