The 18.104.22.168 version of Counter-Strike: Source is available as a free download on our website. Our built-in antivirus scanned this download and rated it as 100% safe. The actual developer of the software is Valve. Counter-Strike: Source is categorized as Games.
From the developer:
Counter-Strike: Source is a remake of Counter-Strike, and consequently retains all of its team-based objective-oriented first-person-shooter style gameplay.
You may want to check out more software, such as Source Insight, MapGuide Open Source Release or Counter-Strike Source by eXpandedCS, which might be similar to Counter-Strike: Source.