Single-player games like SPACEUM
Below are 9 single-player Steam games similar to SPACEUM, 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 SPACEUM page.
Ranked picks
- 1
Red Sector
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
A sci-fi roguelike about a lone pilot on a forbidden mission through his galaxy. Piece together his story as you scavenge to build your loadout in this procedurally generated space shoot'em-up.
- 2
Undead Space
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
SPACE - FEAR, AND NO ONE WILL HELP YOU ............. A mix of horror and complete hopelessness. Explore dark corridors, isolated research modules, and abandoned Martian complexes. Here, you are completely alone, surrounded by the undead. Survive by immersing yourself in cosmic SURVIVAL HORROR.
- 3
Alien: Isolation
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action with SPACEUM.
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger.
- 4
Delusion Out of Space
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
Delusion Out of Space is a Lovecraftian sci-fi horror shooter where you find yourself trapped after audacious experiments conducted by an alien race. As you explore a spaceship, you make choices at critical moments, decisions that will determine your fate and the lives of those around you.
- 5
Astral Flux
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
Astral Flux is an action-platformer with roguelite elements where each run is different. Traverse hostile alien planets, discover dark secrets, and face powerful foes in combat.
- 6
Heat Signature
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
Heat Signature is a game from the developers of Gunpoint where you break into spaceships, make terrible mistakes, and think of clever ways out of them. You take a mission, fly to the target ship, sneak inside, and make clever use of your gadgets to distract, ambush and take out the crew.
- 7
Starfighter Origins Remastered
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
Starfighter Origins is an Original 90`s style Indie space combat simulator Based on the CDF Universe. Combining a focus on single player action and a campaign story mode, Starfighter Origins offer fun and diverse gameplay. Designed for keyboard and mouse with full controller support.
- 8
>Mars Taken
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
Mars Taken is a TPP Shooter with aliens on Mars. Explore red planet and follow a deep story. This is not a story about aliens...it is a story about life and love.
- 9
GHOSTWINTER
Single-player alternative to SPACEUM — playable solo, no multiplayer required. Shares Action and Indie with SPACEUM.
You are in The Ghost suit. Welcome to The Virtual world - little village in Siberia, Russia. Try to complete Single game hardcore mission - it's not so easy, but the atmosphere... Winter landscape is beautiful and magic! Play Multiplayer DM/TDM/GG Matches and ranking UP! Have fun!