Single-player games like Solarix
Below are 23 single-player Steam games similar to Solarix, 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 Solarix page.
Ranked picks
- 1

Syndrome
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
Syndrome, a sci-fi survival horror game that places you in a living hell inside a doomed starship. Find out what happened to your lost crew. Run. Hide. Fight. Survive.
- 2

Stygian: Outer Gods
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
Dive into a hostile world that challenges your very existence, in this survival horror game with RPG elements. Unravel a thousand-year-old mystery, risk your sanity and face the Outer Gods with your skills. Every bullet and every decision counts now, are you up to the task?
- 3

DOOM 3
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.
- 4

Eldritch
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action and Indie with Solarix.
Eldritch is the original imsim roguelike: a first-person action game inspired by roguelikes, immersive sims, and H. P. Lovecraft.
- 5

Metro 2033 Redux
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
In 2013 the world was devastated by an apocalyptic event, annihilating almost all mankind and turning the Earth's surface into a poisonous wasteland. A handful of survivors took refuge in the depths of the Moscow underground, and human civilization entered a new Dark Age. The year is 2033.
- 6

>observer_
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Indie with Solarix.
The original first‑person cyberpunk horror detective tale set in a decaying, neon‑scarred future. As an Observer who invades minds to hunt for clues, you will sift through corrupted memories to track down a mysterious killer and confront your own dark past.
- 7

Singularity™
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
FIGHT THE PAST TO SAVE THE FUTURE. STOP THE SINGULARITY. Learn the truth behind a massive cover-up of the catastrophic SINGULARITY, an event that fractured time and threatens the world as we know it. Armed with powerful, advanced weaponry and the experimental Time Manipulation Device, fight enemies from the past, the present, and...
- 8

The Persistence
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action and Indie with Solarix.
Survive aboard a doomed deep space colony starship, overrun with horrific and murderous aberrations. Explore, evade and fight your way through the depths to bring the ship back to Earth. Gather resources, upgrade abilities and fabricate an arsenal of weapons in this sci-fi horror roguelite.
- 9

System Shock
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
A first-person fight to the death in the depths of space!
- 10

Thief
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
Garrett, the Master Thief, steps out of the shadows into the City. In this treacherous place, where the Baron’s Watch spreads a rising tide of fear and oppression, his skills are the only things he can trust. Even the most cautious citizens and their best-guarded possessions are not safe from his reach.
- 11

Phasmophobia
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action and Indie with Solarix.
Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can.
- 12

Dead Space
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
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.
- 13

Deus Ex: Game of the Year Edition
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
The year is 2052 and the world is a dangerous and chaotic place. Terrorists operate openly - killing thousands; drugs, disease and pollution kill even more. The world's economies are close to collapse and the gap between the insanely wealthy and the desperately poor grows ever wider.
- 14

METAL GEAR & METAL GEAR 2: Solid Snake
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
The first and second title in the METAL GEAR series that established the stealth action genre, as well as the basic mechanics of the series.
- 15

METAL GEAR SOLID V: THE PHANTOM PAIN
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
Ushering in a new era for the METAL GEAR franchise with cutting-edge technology powered by the Fox Engine, METAL GEAR SOLID V: The Phantom Pain, will provide players a first-rate gaming experience as they are offered tactical freedom to carry out open-world missions.
- 16

De-Void
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Indie with Solarix.
De-Void is a first-person adventure game, where the player unravels the mysterious circumstances surrounding the disappearance of a remote space colony crew.
- 17

Post War Dreams
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action and Indie with Solarix.
POST-WAR DREAMS is a 2.5D Story-Rich, Side Scrolling Action Game, set in the wasteland of USA, plagued with constant war.
- 18

Reframed
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action and Indie with Solarix.
ReFramed is a badass, old-school FPS horror game set in the Solarix universe. Relive the terrors of Solarix in this high-octane, bullet spraying reimagining, only this time, stealth is not an option...
- 19

Blind Souls
Single-player alternative to Solarix — playable solo, no multiplayer required.
Blind Souls is a first-person adventure game where you can see the world through the eyes of a dead painter.
- 20

Caretaker
Single-player alternative to Solarix — playable solo, no multiplayer required. Shares Action with Solarix.
Caretaker is a first-person horror experience. You are hungry for truth and maybe this "caretaker" is hungry for something else. Enjoy a ride of psychotic wickedness, through a maze of “criminally insane” mind
- 21

Frightence
Single-player alternative to Solarix — playable solo, no multiplayer required.
Frightence is a short, intense first-person horror experience.
- 22

Platform Game Maker
Single-player alternative to Solarix — playable solo, no multiplayer required.
Platform Game Maker is exciting tool to make your dream Platform Game!
- 23

Death Motel
Single-player alternative to Solarix — playable solo, no multiplayer required.
Death Motel is a short, intense first-person horror experience about the paranormal events occurring at abandoned Crimson Motel.