A 4chan Hacker has leaked the Source Code for CounterStrike: GO as well as Team Fortress 2. This is extremely problematic for both communties as hackers have full control over the game's source code meaning they can create new exploits much easier as well as install a remote code execution that can be used to run malicious code on your game. So right now it would be advisable to not run TF2 or Counterstrike Go.
