Single-player games like Underspace
Below are 12 single-player Steam games similar to Underspace, 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 Underspace page.
Ranked picks
- 1
The Mystery Of The Moon
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Indie with Underspace.
The game of survival and construction on the surface of the moon. Learn to build a base on the surface of the moon, maintain survival, explore and discover the secrets inside the moon, and solve abnormal problems.
- 2
Rebel Galaxy Outlaw
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Indie with Underspace.
Out of cash, out of luck, out on the fringe. Juno Markev has a killer to tail, a debt to pay, and more trouble headed her way. Rebel Galaxy Outlaw takes place in a greasy, blue-collar world of outlaws, truckers, cops and thieves.
- 3
Starpoint Gemini 2
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and RPG with Underspace.
Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever.
- 4
QANGA
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Indie with Underspace.
QANGA: 750 years after humanity's fall, you must survive in a shattered world where Earth itself demands vengeance. Tear through the fabric of space to face the Voss, awaken the ancient civilisation, and dare to challenge the Sanglines, born from the bowels of a world that condemned you.
- 5
SpaceBourne 2
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Indie with Underspace.
Embark on a journey to greatness. Get ready for adrenaline-fueled battles and a chance to claim your place in the galaxy. Grab the controls of your ship, gear up for the fight, and unleash your ambition to conquer and build a new empire in the vastness of space.
- 6
Avorion
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Indie with Underspace.
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
- 7
Chorus
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Adventure with Underspace.
Take control of Nara on a quest to destroy the dark cult that created her. Unlock devastating weapons & mind-bending abilities in an evolution of the space-combat shooter. Along with Forsaken, her sentient starfighter, explore ancient temples, engage in zero-g combat & venture beyond waking reality.
- 8
EVERSPACE™ 2
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Adventure with Underspace.
EVERSPACE 2 is a fast-paced single-player spaceship shooter with exploration in space and on planets, tons of loot, RPG elements, mining, and crafting. Experience an exciting sci-fi story set in a vivid, handcrafted open world full of secrets, puzzles, and perils.
- 9
The Elder Scrolls V: Skyrim
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares RPG with Underspace.
EPIC FANTASY REBORN The next chapter in the highly anticipated Elder Scrolls saga arrives from the makers of the 2006 and 2008 Games of the Year, Bethesda Game Studios. Skyrim reimagines and revolutionizes the open-world fantasy epic, bringing to life a complete virtual world open for you to explore any way you choose.
- 10
Freespace 2
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action with Underspace.
FreeSpace 2, the follow up to the classic Descent: FreeSpace – The Great War is ready to engage you in the second round. Follow the Grand Terran Vasudan Alliance further into the mysteries of the Shivans. Get your flight stick and hit the flight deck. The last time was just a warm up.
- 11
No Man's Sky
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Action and Adventure with Underspace.
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.
- 12
Sunless Skies: Sovereign Edition
Single-player alternative to Underspace — playable solo, no multiplayer required. Shares Indie and Adventure with Underspace.
SAIL THE STARS. BETRAY YOUR QUEEN. MURDER A SUN. Sunless Skies is a Gothic Horror roleplay game with a focus on exploration and exquisite storytelling.