It's the Haunted Mansion re-created in 3-D. I've made a few game mods, but this really is my best yet. Based on the actual location, and using photos and blueprints, it's the most accurate re-creation of the attraction ever made. Now, it's just a walk-through, but I plan on including a kind of puzzle-solving variation, and a "movie" version as well. A %80 complete demo version is available to download. Check it out. If you've never seen the attraction, this is as good a being there. It's as photo-realistic as I can make it, within the limits of the Zdoom game engine.
This file changes Doom2 and Zdoom into The Haunted Mansion Zdoom.