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.
Recreating HL1 using Source and updated textures was a good idea for sure, since it's a pleasure to revisit these good old places. I never cared that much about a game graphics, but I have to say that in Black Mesa, the graphic improvement really counts, great work. Also, the maps changes from HL1 are mostly good one.
Too bad the devs decided to make the few boring points of HL even more boring, especially in the second half of the game. All the places that were containing a large number of enemies in HL1 now contains twice, thrice more enemies. Vents containing one or two headcrabds in HL1 now contain 4 or 5. Enemies keep attacking you as soon as you fall in a new room, mostly from behind, and so on. Doesn't make the game harder than HL1, you just have to keep on testing/reloading, which is boring.
Voices are nice, but you often can't hear anything.
AI is mostly ok, but I wonder why (in most levels) enemies always know where the player is and guys with machine guns can aim that well at long distance.
Also, there are many annoying nonsense details. Some items that you cannot carry with you for no reason, doors that lock behind you for no reason (you nearly never can go back to a previous level), items that disappear when loading a new level (eg: tentacle pit) and I still wonder why butane bottles never explode.