Call of Cthulhu: Dark Corners of the Earth. I bought my copy on Steam, which apparently comes with a bug where during the battleship section where you're supposed to snipe the fishmen sorcerers with the main canon they turn invisible and your turret can't zoom in. That was the first time I gave up. Then I found a thread on the Steam forums this past December pointing out a mod to the game that allows you to skip that portion after three tidal waves passed, which I immediately downloaded and proceeded to play from the beginning to get back in the mood. After gutting Father Dagon and fighting my way through the underwater city to Mother Hydra, I got to the point where you're supposed to escape the city as it falls apart around you. No matter how times I've replayed it, as soon as I reach the wooden portcullis that Sebastian Marsh trapped you in earlier, I get flattened by the falling ceiling. I spent three straight hours trying to get past that point. I always avoided falling debris on the way, I took the shortest route from point A to B that shaved entire milliseconds and what do I get? Boom. Fall. Splat. This was literally the last minute of game play, and I couldn't get past it again because of buggy programming.