Love this game. It reminds me a little of Super Meat Boy except it's not as ridiculously difficult or as overly long or as complex.
All good things in other words.
It's really just a fun, silly, crazy game that almost anyone could and should try because you may well find yourself becoming hooked after puzzling through a few levels.
This didn't even feel like a mod! One of the best games ever produced by mankind. Everything from the textures to the scenarios were, personally, impeccable. The music was great and fit for every occasion. This is a must play for anyone, whether you played HL or are new to the series. To be completely frank however, there was a huge issue in the game, at least for me. THERE WAS NOT ENOUGH OF IT! We need more Black Mesa. More story, more gameplay, more soundtracks, more everything. Many thanks to the developers and anyone who made this possible.