Single-player games like Gray
Below are 8 single-player Steam games similar to Gray, 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 Gray page.
Ranked picks
- 1
Omniscient
Single-player alternative to Gray — playable solo, no multiplayer required. Shares Indie with Gray.
Omniscient is a first person horror set aboard a research ship drifting in Neptune's orbit. Your crew is gone. The power is out. And something else lurked onboard. Unarmed and alone, trust your newly enhanced senses to survive. They are your greatest gifts, after all.
- 2
Moons of Madness
Single-player alternative to Gray — playable solo, no multiplayer required.
Moons of Madness is a first-person, story-driven cosmic horror game where the scientific exploration of Mars meets the supernatural dread of Lovecraft.
- 3
ROUTINE
Single-player alternative to Gray — playable solo, no multiplayer required. Shares Indie with Gray.
ROUTINE is a First Person Sci-Fi Horror set on an abandoned lunar base designed around an 80s vision of the future. Explore and investigate your surroundings as you survive against unknown threats.
- 4
Observation
Single-player alternative to Gray — playable solo, no multiplayer required. Shares Indie with Gray.
Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M.
- 5
Dead Space (2008)
Single-player alternative to Gray — playable solo, no multiplayer required.
You are Isaac Clarke, an engineer on the spacecraft USG Ishimura. You're not a warrior. You're not a soldier. You are, however, the last line of defense for the remaining living crew.
- 6
Voyager-19
Single-player alternative to Gray — playable solo, no multiplayer required. Shares Indie with Gray.
A short horror game where you control a decaying spacecraft exploring distant star systems.
- 7
Dead Space
Single-player alternative to Gray — playable solo, no multiplayer required.
The sci-fi survival-horror classic returns, completely rebuilt to offer an even more immersive experience — including visual, audio, and gameplay improvements — while staying faithful to the original game’s thrilling vision.
- 8
The Casting of Frank Stone™
Single-player alternative to Gray — playable solo, no multiplayer required.
The shadow of Frank Stone looms over Cedar Hills, a town forever altered by his violent past. As a group of young friends are about to discover, Stone’s blood-soaked legacy cuts deep, leaving scars across families, generations, and the very fabric of reality itself.