The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
This might be fun for people to play with: it's a rejected portal I designed for Black Mesa before I was removed from the Development Team. I thought I'd upload it since the SDK is nonfunctional at the moment and I'm bored. Just copy the contained files into your Half-Life 2 or mod directory to the folders specified, and enjoy!
Hey Bob Marley, whats it like in there?
Dave ..hey dave ..too many colours maann!
what does it do or what do i do at what point in the game ?
does it have a menu or a starting point in game ?
Sorry for such a very late reply, but I didn't receive any notification from ModDB that you'd posted your comment.
What you do is extract the files to the appropriate locations, and then run the map from the console.