Single-player games like Osteomalacia
Below are 8 single-player Steam games similar to Osteomalacia, 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 Osteomalacia page.
Ranked picks
- 1
Rontgard
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
A tense top-down post-apocalyptic survival shooter where every bullet, bandage, and inventory slot matters.
- 2
Project S.U.N.D.I.A.L
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
Project S.U.N.D.I.A.L. is a PvPvE extraction shooter playable in single-player or online. Explore a shattered Europe, battle hostile players, ruthless raiders, and terrifying Hollows, then fight your way to extraction.
- 3
Apocalypse Survivors
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
As the savior of the apocalypse, take up your weapons and unleash your powers. Rescue survivors, confront waves of zombies, and through relentless searching, become an immortal warrior. Write your own glorious legend in this plague-ridden hell.
- 4
Dead Extraction
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
Explore zombie-infested Tokyo, scavenge resources, and make it out alive. Expand your shelter, manage survivors, and face dynamic threats and deadly bosses in a top-down extraction survival roguelite.
- 5
Scrappage
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
In this unforgiving rogue-lite twin stick shooter, death awaits you behind every corner. Fight your way through hordes of monsters, eliminate bosses and loot their valuable items and body parts. With them you can enhance your own body, unlock powerful skills and create your own unique builds.
- 6
DROSS
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
DROSS is a procedurally Generated FPS, set in a derelict facility infested with alien bugs. Explore, collect powerful weapons and equipment, to upgrade your gear and fight the Dross.
- 7
Vault of Eras
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
A bullet hell shooter, dungeon crawler about robbing a pyramid that rearranges itself after every run.
- 8
Reality Core
Single-player alternative to Osteomalacia — playable solo, no multiplayer required. Shares Action with Osteomalacia.
Blast through chaotic dungeons and unleash powerful weapons as you journey through the multiverse in search of a way home. Dodge, loot, and survive against deadly foes, extracting hard-won treasures to repair your ship and make it back!