Mystery House Demo
Free demo
A first and third-person horror revival of Roberta Williams' Mystery House - the 1980 classic that invented the graphic adventure. A game night in an abandoned Victorian House turns deadly. Solve its puzzles, uncover a buried legacy, and escape before the house kills you.
About Mystery House Demo
Mystery House Demo is a free Steam demo from Guillotine Games, www.guillotine.games. Steam files it under Adventure, Casual and Indie. It supports single-player and runs on Windows. Steam lists the release date as Oct 26, 2026. We first spotted it on Oct 27, 2026.
- Type
- Steam demo
- Status
- open
- For
- Mystery House
- Developer
- Guillotine Games, www.guillotine.games
- Genres
- Adventure, Casual, Indie
- Platforms
- Windows
- Release
- Oct 26, 2026
- First seen
- 2026-10-27
