Single-player games like Deep Space
Below are 13 single-player Steam games similar to Deep Space, 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 Deep Space page.
Ranked picks
- 1
Humanity Lost
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Adventure with Deep Space.
Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.
- 2
Mighty Vikings
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
You have to take on the role of Captain Bjorn and go on an adventure and clear the land of evil spirits.
- 3
Book of Spells
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Indie and Adventure with Deep Space.
Book of Spells is an adventure game with RPG elements. You will take on the role of a traveler eager for new adventures!
- 4
Within the Cosmos
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
Within the Cosmos is a sci-fi RPG. After awakening in a secluded star system, you soon discover a fractured human society grappling with an emerging android threat. Explore planets, uncover mysteries, and navigate differing philosophies. Your choices will shape how the story unfolds.
- 5
Legacy of Mind
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
Legacy of Mind is the first gothic soulslike FPS where nightmares and reality have merged. Face colossal Monarchs that rule over the broken world twisted by living nightmares and unlock otherworldy powers hidden within your mind, but with every power unlocked, something in the dark wakes with you...
- 6
CINIS
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
CINIS is a fast-paced FPS-RPG set in a dying world. Master a lethal combination of long-range gunplay, close quarters parry-based melee, and powerful Runic Miracles in order to purge the Chaos Rifts and restore order to the Realm.
- 7
Unknown Signal: Invasion
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
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.
- 8
Nomad Station
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
Become a master MI6 saboteur, and earn your name as the ministry's most important asset on the Moon in this 1st-person shooter VR sci-fi epic! Follow the orders of your handler, or explore and find new weapons and defenses! Do whatever it takes to complete your mission!
- 9
UNDEFINED
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
An exciting first-person game, which takes place in the near future. You wake up in a strange place "Discovery One" you are hiding from the outside world. You are increasingly starting a casual relationship.
- 10
The Lost Dungeon Of Knight
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
The Lost Dungeon Of Knight is a first-person adventure game with puzzle elements.
- 11
Curse of the dungeon
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
You have to explore amazing places to get to the secret secrets of your soul.
- 12
Adventure Galaxy
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Indie and Adventure with Deep Space.
Adventure Galaxy - an indie game with a first-person view, the game takes place on a space station in space.
- 13
Night Darkness
Single-player alternative to Deep Space — playable solo, no multiplayer required. Shares Action and Indie with Deep Space.
You have to take control of one of the most famous mercenaries and complete a special mission to save humanity from certain death.