This is, arguably, my all-time favorite game. I bought it spontaneously at the store one day when I was a teenager, after having played the demo, and a part of me was concerned because it was an impulse buy and that never goes well.
Boy, was I wrong! To this day, Realms of the Haunting remains one of my most memorable game experiences. Whenever I ultimately find the time and money to finish Stonewall Penitentiary, you will find that it is, in many ways, a tribute to Realms of the Haunting.