I assume you've heard of the actual game Black Mesa, right? It's basically an 8-ish year project where people essentially remade Half Life (like a proper, amazing remake).
If you haven't, go try it out. It's free and it's amazing. It's not an exact replica mind you. They cut down lots of "On a rail" (thank god.....) and reduced the story-line bits of Surface Tension (though the level itself is too hard for my tastes). The Ichthyosaur, oh god. Scary enough as it is, and then they had to make it more of a nightmare than before (it's too easy to kill now, but it's so scary I don't mind that much).
If you have played it or heard of it, what did you think?
On to the picture. I love it! Gordan is so adorable there. C: