They are waiting for you gordon. In the "tessst" chamber. Black mesa is a small asymmetric action packed arena. 1vs1-4vs4, CTF, slayer. add me on xbox live - cpt turdballs - if you are up for a 1on1 battle
From what I can tell it seems like it'd be a cool map. From what I can tell... Problem is, is that your photos of your screenshots aren't really that good. The shots are too dark to tell anything, so I'd advise you to grab a USB and get the screenshots using this site.
I was listening to a portal dubstep when I was browsing through the forums and when it said 'Black Mesa' my eye stopped on this. Thought it was a sign to post here. Congratulations on doing something supernatural.