Single-player games like Outcast on Mars
Below are 8 single-player Steam games similar to Outcast on Mars, 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 Outcast on Mars page.
Ranked picks
- 1
The Fibrous - Operation Reclaim
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Adventure with Outcast on Mars.
The Fibrous - Sci-Fi Online or Single-Player TPS (Over-The-Shoulder) covering the story of an ex-marine recruited by what's left of the military to help take back Earth after a meteor crash-lands into Earth and aliens with fiber-like skin emerge, thinking they can take this planet for their own.
- 2
Robowork
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Adventure with Outcast on Mars.
Explore a planet with your friend or alone, upgrade yourself and try to return to Earth in your adventure that begins with your spacecraft sent by "Space-T" to explore other planets!
- 3
Captain Meow
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Strategy with Outcast on Mars.
FPS RPG Action Adventure
- 4
The Edge Of The World Z (Will Shock You) حافه العالم زيد
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Strategy with Outcast on Mars.
THIRD PERSON SHOOTER GAME (ZOMBIE AND SCI FI stories)COLLECT WEAPONS AND FRIENDS TO FIGHT , SURVIVE AND SAVE THE WORLD. THAT HAVE BEEN CAPTURED BY ENEMIES , COMPLETE MISSION AND LOT OF LEVELS(FROM EASY TO HARD) THIS GAME CONTAIN ARENA AND SPECIAL STORY ) .
- 5
Dead Space™ 2
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Adventure with Outcast on Mars.
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.
- 6
How To Survive: Third Person Standalone
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Adventure with Outcast on Mars.
Driven by community suggestion, 505 Games and EKO Software introduce you to a new single player 3rd person view experience that allows you to re-play the zombie crafting adventure "How to Survive" from a deeply immersive point of view.
- 7
Dead Space
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and Adventure with Outcast on Mars.
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.
- 8
Earth's Shadow
Single-player alternative to Outcast on Mars — playable solo, no multiplayer required. Shares Action and RPG with Outcast on Mars.
Earth's Shadow is a third person action Sci-Fi dungeon crawler set in the year 3081 on planet Sumbra; a remote alien planet where legends of valuable relics surround this black world, calling to the greedy and brave explorers seeking a bright future... but end up uncovering an even darker past.