Single-player games like Monstrum
Below are 10 single-player Steam games similar to Monstrum, 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 Monstrum page.
Ranked picks
- 1
Outlast
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
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.
- 2
Teleglitch: Die More Edition
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
In a cold, dark future dominated by mega-corporations, a small lonely planet on the edge of habitable space is the site of a shadowy research facility specializing in necrotic tissue reactivation. You are a scientist who has suddenly awoken to the realization that you are the lone survivor.
- 3
The Persistence
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
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.
- 4
Alien: Isolation
Single-player alternative to Monstrum — playable solo, no multiplayer required.
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger.
- 5
Amnesia: The Bunker
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
Amnesia: The Bunker is a first-person horror game set in a WW1 bunker. A relentless, AI-driven monster stalks you. Survival depends on finding tools, crafting items, and keeping the lights on.
- 6
Syndrome
Single-player alternative to Monstrum — playable solo, no multiplayer required.
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.
- 7
Eldritch
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
Eldritch is the original imsim roguelike: a first-person action game inspired by roguelikes, immersive sims, and H. P. Lovecraft.
- 8
Narcosis
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
Survival, horror at the sunless depths of the Pacific Ocean: Stranded on the seafloor with low light and few tools, an industrial diver takes desperate steps to surface before his oxygen — and sanity — give out.
- 9
Attack of the Earthlings
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
Take on Galactoil, a comically dysfunctional intergalactic energy corporation, and its larger-than-life employees in a tactical-stealth game that fuses satisfying strategic gameplay and dark comedy in a quirky single-player story.
- 10
Bootleg Steamer
Single-player alternative to Monstrum — playable solo, no multiplayer required. Shares Indie with Monstrum.
In this rogue-like game, you embark on your journey as a captain during the tumultuous American Prohibition. Overcome challenges like inclement weather, relentless Coast Guard pursuit, shrewd Mafia dealings, and your own financial pitfalls, all while ensuring your path to wealth remains unhindered.