This mod was good, until the absolute end. The visuals were interesting, it was a mix between Ravenholm and Combine stuff. The fights were fun (until the end) and the actual puzzles were okay.
At the very end, however, it gets extremely tough. I didn't have to cheat to beat it, but it was a tedious and overly brutal climax involving fighting combine and a helicopter and having to hunt for hp every second because there was no place to stop and breathe. This was made worse at the very end with an almost endless supply of baddies running down a tunnel.
If there is one thing to learn from this mod, it's not to overwhelm the player and to give them time to breathe between fights. The fact that it was an unforgivably tough ending tarnishes an otherwise interesting and challenging game.
Other people seemed to enjoy this difficulty, and admittedly the description of the game says that it's made to be difficult, but there's difficulty and then there's a wall of a difficulty curve, and the very end is really the latter.
This game is exceptionally fun, though as an early game it does have it's bugs, for example when running into other players can cause quite a fun and odd "glitch". Though I when I came back after a patch and the tech tree was changed in a way I didn't fully like. Granted some changes I love, but I really dislike forcing players now to progress much father to be able to create airplanes is kinda disappointing, because Before the change I loved my little plane. It was a great RP maker, and got me decent experience. Though overall I am happy with this game. It is very fun and good stress reliever, the sheer joy to destroy other players robots block by block just makes all your worries just fade away while playing this. I was so happy when I first found this game because I love World of tanks and I like the sandbox freedom of creativity of mine-craft, and to put that together with such precision as they did was a glorious success. KEEP UP THE GREAT WORK ROBOCRAFT DEVELOPERS!
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.