Single-player games like Galactic Sanctuaries
Below are 9 single-player Steam games similar to Galactic Sanctuaries, 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 Galactic Sanctuaries page.
Ranked picks
- 1
Mission: Aliens
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action with Galactic Sanctuaries.
Sergeant, last night we received a signal that an unknown aircraft of extraterrestrial origin had crashed in the taiga. The locals assured us that at the crash site they observed five creatures very similar to humans, only with gray skin and large almond-shaped eyes.
- 2
PENGUIN HOTEL -Chapter 1-
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
You have been invited to the popular “Penguin Hotel”. There, you get caught up in a terrifying event. Solve puzzles and battle with a special camera! Experience a very strange penguin horror.
- 3
Unknown Signal: Invasion
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
Unknown Signal: Invasion is a continuation of the exciting sci-fi game. This time you have to go to an unknown planet to investigate a new mysterious signal coming from an unknown source.
- 4
NUC: After The Blast
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
Try to survive and find your family after a massive Nuclear Power Plant explosion.
- 5
Epoch Makers
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
Step into the past and rebuild history in Epoch Makers, a co-op restoration sim for 1–4 players. Clean, repair, and reconstruct iconic landmarks while tackling tricky obstacle courses that test your coordination, timing, and teamwork.
- 6
Chronicles of Deeps
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action with Galactic Sanctuaries.
Chronicles of Deeps is Sci-fi FPS where you need to control submarines to get through story. In 2070, an event happened which left the whole world under the ocean. People separated on fractions and started to fight for resources. In 2112, some things happened which you should discover in this game.
- 7
Android Simulator: Prologue
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
Android Simulator: Prologue is just part of the amazing adventure that awaits you in the full version of the game. Take charge of a spaceship colony, flight route and manage the right water balance for plants, oxygen level, and spacecraft parameters to securely deliver the colonizers.
- 8
RFA Station
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
A space shooter in which you must defeat alien robots.
- 9
Into The Depths
Single-player alternative to Galactic Sanctuaries — playable solo, no multiplayer required. Shares Action and Indie with Galactic Sanctuaries.
Escape the lab and survive through dangerous monsters and military personnel