Single-player games like The Callisto Protocol™
Below are 16 single-player Steam games similar to The Callisto Protocol™, 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 The Callisto Protocol™ page.
Ranked picks
- 1
Dead Space
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
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.
- 2
Dead Space™ 2
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Three years after the Necromorph infestation aboard the USS Ishimura, Isaac Clarke awakens from a coma, confused, disoriented, and on a space station called The Sprawl. Explore this world and its zero-g environments to discover the truth about the Unitology and its role in the Necromorph epidemic.
- 3
Dead Space (2008)
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
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.
- 4
Colony - Arena Online
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Fight against rebel robots together with your friends and save planets from invasion....
- 5
SPIRITUS 2
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
The survival horror concludes in part two of SPIRITUS, set in a post-apocalyptic city and the depths of pure evil. Survive in classic 90's gaming tropes augmented with modern HD graphics.
- 6
Cyanide Space Girls
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Join four elite C.A.T. pilots in explosive 4-player co-op action! Fly through procedurally generated galaxies, unlock devastating weapons, combos, and upgrades, and fight to rid the cosmos of an ancient alien scourge!
- 7
Lurking Danger
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Lurking Danger is a survival horror where Elena and Regina, two diner waitresses, uncover a dark secret. Reality twists into a nightmare as they face terrifying creatures. Play solo or in split-screen co-op, solve puzzles, and fight for survival in a haunting atmosphere.
- 8
Voidling Bound
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Hatch, evolve, and upgrade powerful space creatures in this action-packed sci-fi 3rd person shooter that reinvents the monster taming genre!
- 9
Resident Evil
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
The game that defined the survival-horror genre is back! Check out the remastered HD version of Resident Evil.
- 10
The Evil Within
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action with The Callisto Protocol™.
Developed by Shinji Mikami -- creator of the seminal Resident Evil series -- and the talented team at Tango Gameworks, The Evil Within embodies the meaning of pure survival horror. Highly-crafted environments, horrifying anxiety, and an intricate story are combined to create an immersive world that will bring you to the height of tension.
- 11
The Life and Suffering of Sir Brante
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Adventure with The Callisto Protocol™.
A narrative-driven hardcore RPG set in a gritty world ruled by real but unrelenting gods. Set out on a challenging lifetime journey, where every choice has a price and entails consequences. Will you become an inquisitor, a judge, or conspire against the old order? Dare to decide!
- 12
Resident Evil 4
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Survival is just the beginning. Six years have passed since the biological disaster in Raccoon City. Leon S. Kennedy, one of the survivors, tracks the president's kidnapped daughter to a secluded European village, where there is something terribly wrong with the locals.
- 13
SILENT HILL 2
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
Investigating a letter from his late wife, James returns to where they made so many memories - Silent Hill. What he finds is a ghost town, prowled by disturbing monsters and cloaked in deep fog. Confront the monsters, solve puzzles, and search for traces of your wife in this remake of SILENT HILL 2.
- 14
Quake 4
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action with The Callisto Protocol™.
As part of the elite Rhino Squad, you must spearhead Earth’s military invasion of a hostile alien homeworld. But, in this desperate war for humanity’s survival against an unrelenting enemy, you may discover that the only way to defeat them...is to become one of them.
- 15
The Last of them
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action and Adventure with The Callisto Protocol™.
You play as a detective solving gruesome murders in a haunting, desolate city. Explore dark alleys, uncover hidden clues, and solve puzzles to unravel the mystery. Can you find the killer before they strike again, or will you fall victim to the terror?
- 16
![[REDACTED] — Steam game cover](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/2229940/header.jpg?t=1746457046)
[REDACTED]
Single-player alternative to The Callisto Protocol™ — playable solo, no multiplayer required. Shares Action with The Callisto Protocol™.
Get ready to massacre monsters, race your rivals, and combat corpses of your fellow guards as you race to escape Black Iron Prison in the critically acclaimed roguelike, [REDACTED].