If you love your horror games, keep an eye on Ellen as it looks pretty spooky. Turns out Red Mount Media will be doing a Linux version and they require testers.
Changeover: Decisions caught my eye recently as a new release on Steam. It contains elements of a platformer, a visual novel and horror to create a bit of a weird mix.
One I missed actually getting full Linux support earlier this year was PLAY WITH ME, a game that mixes puzzles and horror together to create a weird experience.
Dead Drop Studios has just released the survival horror games Outbreak & Outbreak: The New Nightmare on Linux, their next game Outbreak: The Nightmare Chronicles is also now coming to Linux.