Single-player games like GreyWake: Project Somnium
Below are 8 single-player Steam games similar to GreyWake: Project Somnium, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like GreyWake: Project Somnium page.
Ranked picks
- 1

Maid of Sker
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Maid of Sker is a first-person survival horror, set in a remote hotel with a gory and macabre history from Welsh folklore. Brave the nightmares of the Quiet Ones. Do not panic…don’t even breathe!
- 2

Among Ashes
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Among Ashes is a terrifying first-person survival horror game. Your friend has sent you a link to a game that someone posted online, but as you play you quickly realise that something is terribly wrong. Whatever you do… K̴͉͚̗̅̃̄E̷͓̤̺̊͠E̴̤̰̿̽P̴̠̳̀́ ̴̨̮̭̕̚P̷̠͇̳͐̓̀L̶̹̔Ả̷̧Y̵̘̺͆̓Ï̸̻̏͂N̷͙̯͊G̵͖̹̠̽̿
- 3

Midnight: Submersion - Nightmare Horror Story
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Nightmare Horror Story an adventure game from the first face in a horror genre provides you to take a trip in a huge and dark city full of dummies. You would have a possibility to figure out in a weird atmosphere when alive people are missed and everything that had remained is the dummies.
- 4

Absolute Fear -AOONI- / 最恐 -青鬼-
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
20 years after the birth of the legendary horror game "AOONI"... A completely new first-person, 3D horror stealth action "Absolute Fear -AOONI-" is now available! Players take on the role of a younger sister searching for her older sister in a mysterious mansion where AOONI roam.
- 5

The Coma 3: Bloodlines
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Welcome to the world of The Coma 3: Bloodlines. In this realm of shadows rumors and urban legends become reality, and danger lurks around every corner. If a living intruder dies here, their body will be severed from their spirit and never wake again ...
- 6

Paper Dolls 2 纸人贰
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Paper Dolls 2 is a first-person horror adventure game. A dark aura emanates from a Qing dynasty dwelling—the Yin Mansion. What happened to the once-famous Yin Family? Clues lead us to its second floor haunted by restless spirits. A truth, buried for over a hundred years, is waiting to be unraveled.
- 7

Outlast
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Action and Indie with GreyWake: Project Somnium.
Hell is an experiment you can't survive in Outlast, a first-person survival horror game developed by veterans of some of the biggest game franchises in history. As investigative journalist Miles Upshur, explore Mount Massive Asylum and try to survive long enough to discover its terrible secret... if you dare.
- 8

Amnesia: Rebirth
Single-player alternative to GreyWake: Project Somnium — playable solo, no multiplayer required. Shares Indie and Adventure with GreyWake: Project Somnium.
A first-person horror adventure. Uncover your past and survive the Algerian desert. Fear is your enemy; stay calm to not succumb to an illness threatening you and your loved one. Avoid darkness, hide from monsters and solve puzzles. Adventure Mode available for a less scary experience.