Single-player games like Sinister Outbreak
Below are 8 single-player Steam games similar to Sinister Outbreak, 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 Sinister Outbreak page.
Ranked picks
- 1
Devil Should Die
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Adventure with Sinister Outbreak.
Third person shooter game very exciting Includes all enemies in one game and weapons build system arena so you can fight them all at once so have fun
- 2
Dead Space
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Adventure with Sinister Outbreak.
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.
- 3
Dead Space™ 2
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Adventure with Sinister Outbreak.
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.
- 4
Daymare: 1998
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Sinister Outbreak.
DAYMARE: 1998 is a third-person survival horror game that recreates the mood of iconic titles from the '90s, with a fresh storyline. An incident that turns a small town into a deadly zone, three characters to play with and little time to find the truth, before its mutated citizens abruptly end your mission.
- 5
AI Olympius
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Sinister Outbreak.
Join the rebels in a third-person shooter with RPG elements and base-building mode. Fight against various combat drone models under the control of the supreme AI.
- 6
Sniper Elite 5
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Adventure with Sinister Outbreak.
The award-winning series returns as Karl Fairburne fights to uncover Project Kraken in 1944 France. The genre-defining authentic sniping, with enhanced kill cam, has never looked or felt better as you fight across immersive maps to stop the Nazi war machine in its tracks.
- 7
Dark Sector
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action with Sinister Outbreak.
A third-person Action/Shooter that thrusts players into a sci-fi flavored nightmare scenario set in the post Cold War era.
- 8
Airtight City 密闭之城1.0
Single-player alternative to Sinister Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Sinister Outbreak.
This is a TPS, horror-type action shooting game. The game will draw players into a terrifying dark world with detailed atmosphere rendering and weird story. Here, you are not defenseless, but even with a gun, you can't suppress the trembling from the heart. Game revenue is used for 2.0 development.