The environment of this mod is top notch. I have only played a couple of half-life mods, and this is my second best with first being Field Intensity.
The only thing that I didn't like about this mod is the number of enemies it throws at you. I felt that this one is hard even at medium difficulty level. I had to straight up cheat in the last military fight😜.
Overall, it is amongst the best mod for half-life. If you are a half-life fan and up for a challenge, then this is a must play.