Man, this is a disaster. Half Life 2 forums is reporting (and as been confirmed by a PM at Valve) that the SOURCE CODE (yes you read right!) to Half Life 2 has been leaked out.
What this means... the whole new engine for Half Lilfe 2 that so many people have been waiting for is compromised. The whole release of the game is compromised. Horrible.
A sad day for all software companies out there...
So, Valve is asking for everyone's help... if you know anything about this, please email them at firstname.lastname@example.org.