The Official Black Mesa Trailer has finally been released and all I can say is Awesome. Being a mod, It looks more polished than most A+ released game titles.
The wait was just long enough for all kinds of crazy bets to be made, but time to cash those in, because the Black Mesa Trailer is good to go and up for viewing! You can download the high resolution version straight off of Monkey-Junkie’s website and on youtube. We hope this gives you a small taste of what the game will be like, and we hope it was worth the extra wait! Source