The one that still pains me to this day is Black Mesa.

I thoroughly enjoyed it, I even played it before the last chapter was done. I was really excited to go through the redesigned Xen levels, and was enjoying every minute.

Then they throw that massive spider into a huge arena filled with micro obstacles that prevent you from properly avoid all the multiple types of attacks it throws at you, while absorbing insane amounts of rockets.

I’m not a skilled gamer but I was moving through the game just fine until someone decided to crank the difficulty to eleven.

That killed the game right there for me. Other than that, it’s a brilliant game that I heartily recommend.