Single-player games like Phantaruk
Below are 16 single-player Steam games similar to Phantaruk, 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 Phantaruk page.
Ranked picks
- 1

Syndrome
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Adventure with Phantaruk.
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

Penumbra Overture
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
Penumbra: Overture is a first person survival horror game, emphasizing on survival and problem solving instead of mindless violence and gore.
- 3

Amnesia: The Dark Descent
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
Amnesia: The Dark Descent, a first person survival horror. A game about immersion, discovery and living through a nightmare. An experience that will chill you to the core.
- 4

Still Wakes the Deep
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
1975. Disaster strikes the Beira D oil rig off the coast of Scotland. Navigate the collapsing rig to save your crew from an otherworldly horror on the edge of all logic and reality in this 3x BAFTA Games Award-winning narrative horror experience.
- 5

The Persistence
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
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.
- 6

Outlast
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
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.
- 7

Alien: Isolation
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action with Phantaruk.
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger.
- 8

ROUTINE
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
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.
- 9

Prey
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Adventure with Phantaruk.
In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted.
- 10

SOMA
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Indie with Phantaruk.
From the creators of Amnesia: The Dark Descent comes SOMA, a sci-fi horror game set below the waves of the Atlantic ocean. Struggle to survive a hostile world that will make you question your very existence.
- 11

System Shock® 2 (1999)
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action with Phantaruk.
"Remember, it is my will that guided you here. It is my will that gave you your cybernetic implants, the only beauty in that meat you call a body. If you value that meat... you will do as I tell you." The cult classic sci-fi horror FPS-RPG has returned.
- 12

System Shock 2: 25th Anniversary Remaster
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Adventure with Phantaruk.
System Shock® 2: 25th Anniversary Remaster is a genre defining experience that established innovative game-play mechanics that are a staple of the FPS and RPG genre today. Survive the wretched corridors of the Von Braun. Your training has prepared you for this.
- 13

Dead Space
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Action and Adventure with Phantaruk.
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.
- 14

We. The Revolution
Single-player alternative to Phantaruk — playable solo, no multiplayer required.
As a judge of the Revolutionary Tribunal, preside over complicated cases of ordinary citizens, dangerous criminals, and enemies of the revolution in revolutionary Paris. Make judgments, plot political intrigue, and try to not lose your own head!
- 15

Mech Mechanic Simulator
Single-player alternative to Phantaruk — playable solo, no multiplayer required.
Become a Mech Mechanic to deconstruct, rebuild, paint and fix gigantic iron machines. You live in an age of enormous machines and you better get ready to get your hands dirty!
- 16

Mech Mechanic Simulator: Prologue
Single-player alternative to Phantaruk — playable solo, no multiplayer required. Shares Indie with Phantaruk.
Become a Mech Mechanic to deconstruct, rebuild, paint and fix gigantic iron machines. You live in an age of enormous machines and you better get ready to get your hands dirty!