Hunter, in Darkness has some of the best pacing of any IF game out there. You are hunting, in the darkness, and you must follow your prey through a cave. Things quickly go from bad to worse, and your injuries and fears come to the front.
In this game, you usually know exactly what you need to do, but may not know how to do it. The final big puzzle in particular took me a long time to get, but the writing was good enough that the game didn't feel stagnant while I was experimenting to solve it.
If you enjoyed Gun Mute or even Attack of the Robot Yeti Zombies, but wanted a more serious experience, this game is for you.