Run. Think. Shoot. Live. Source. Black Mesa is the Half-Life 2 total conversion of the original Half-Life game. Utilizing the Source engine and its endless array of possibilities and powers, Black Mesa will throw you into the world that started the Half-Life continuum and introduced Gordon Freeman to the world as a gun-toting, bullet-dodging Ph.D. in Theoretical Physics.
So you need a review.
No problem, I'll give you one. Where to begin with? Maybe with waiting time. I waited years for this mod release. And it was worth it. It's Half-Life without Xen part, looking and playing better than Half-Life 2 episode 2.
Just get and play it and wait no longer, man.