Single-player games like The Unknown
Below are 10 single-player Steam games similar to The Unknown, 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 The Unknown page.
Ranked picks
- 1
Trajectory
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
Trajectory is a first person scifi adventure game that takes place in Earth's orbit, with a dystopian yet whimsical setting. The game has multiple endings and a variety of exotic locations in space and beyond.
- 2
A Collection of Bad Moments
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Adventure with The Unknown.
A Collection of Bad Moments is an adventure game where the player discovers themselves in various tough situations and must use their wits to figure a way out! The moments vary from a deadly asteroid mission and mysterious virtual reality simulation to an airship duel!
- 3
Tacoma
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
Tacoma is a sci-fi narrative adventure from the creators of Gone Home. Set aboard a high-tech space station in the year 2088, explore every detail of how the station’s crew lived and worked, finding the clues that add up to a gripping story of trust, fear, and resolve in the face of disaster.
- 4
The Abandoned Planet
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
A throw-back, retro-inspired, point and click adventure with chunky and beautiful pixel art
- 5
Between Horizons – A Sci-Fi Detective Adventure
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
Between Horizons is a narrative 2.5D sci-fi detective adventure. 33 years into the Zephyr's journey, its mission is suddenly jeopardized. Can you find the culprit before it's too late? Experience an enthralling story set in a semi-open world that branches and ends based on your choices.
- 6
Return to Grace
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Adventure with The Unknown.
A daring space archaeologist has just unearthed the ancient resting place of a long lost A.I. god known as Grace. Adventure with various fractured A.I. personalities as you uncover the great mystery of why she was shut down all those years ago.
- 7
Quarantine Circular
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
In the middle of a world-ending pandemic, a group of scientists discover the galaxy has been watching. From the award-winning team behind Thomas Was Alone and Subsurface Circular, Quarantine Circular is the next mutation in text-based adventure.
- 8
Cosmonious High
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Adventure with The Unknown.
From the makers of Job Simulator and Vacation Simulator— Welcome to Cosmonious High! Owlchemy Labs presents an out-of-this-world VR experience with their hallmark interactivity and distinctive humor. Meet a colorful cast, adapt outrageous powers, and discover the source of the school’s malfunctions.
- 9
ParryMaster
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Casual with The Unknown.
Defend yourself in this minimalist one-button incremental defense game. One hit, and it’s over.
- 10
The Long Drift
Single-player alternative to The Unknown — playable solo, no multiplayer required. Shares Indie and Adventure with The Unknown.
Build, upgrade, and watch your tiny universe evolve.