Peacekeeper let us know
in the forums that the source code for Half-Life 2 has apparently been released into the wild. This post
on halflife2.net, allegedly by Valve's Gabe Newell, explains what has happened and asks for the help of the community in tracking it down:
What I'd appreciate is the assistance of the community in tracking this down. I have a special email address for people to send information to, email@example.com. If you have information about the denial of service attacks or the infiltration of our network, please send the details. There are some pretty obvious places to start with the posts and records in IRC, so if you can point us in the right direction, that would be great.
We at Valve have always thought of ourselves as being part of a community, and I can't imagine a better group of people to help us take care of these problems than this community.
Again, there's be no official press release or anything about this, just a post on a forum, but everyone else has jumped all over it so we'd be lax in not posting it as well! As a general rule we try and refrain from posting wild rumours, but this is a pretty major one. The comment about denial of service attacks though has been brought up earlier by Valve's Erik Johnson in an email to the HLDS mailing list.