Image: Valve. Valve told ZDNet today that it's safe to play games like Counter-Strike: Global Offensive and Team Fortress 2 even after their source code leaked online today on 4chan and torrent sites.

"I'm not the source of the code, I'm just not," McVicker said. "In fact, I tried very hard to warn Valve about it." So, all in all, there was no leak--or at least not one on April 22, 2020.