Sci-fi builder artwork$9.9947%Mixed

Sci-fi builder

Sci-Fi Builder is a sandbox construction sim where you design a space station, build a colony, and control aliens, robots & NPCs. No grids, no limits — just creative freedom in space.

Screenshots

From the Steam store

Sci-Fi Builder is a sandbox construction and colony sim where you create your own space station, build rooms, place furniture, and control aliens, robots, and NPCs in a fully interactive sci-fi world.

🛸 What Can You Build?

Design custom sci-fi rooms with full creative freedom (no grid snapping)

Place and move furniture, props, and devices anywhere you want

Paint and recolor your station with endless style options

Control lighting and effects for cinematic space vibes

Create unique interactions between characters, robots, and props

Build societies, alien soap operas, or robot dance battles

🤖 Characters & NPCs

Hundreds of beings: humanoids, aliens, robots, and creatures

Customize outfits, personalities, and behaviors

Directly control NPCs or let AI surprise you with emergent stories

Watch colonies form, relationships spark, and chaos unfold

📦 Creative Toolbox

Space furniture, construction parts, computers, and gadgets

Custom colors for walls, outfits, and alien gear

Wardrobe customization for every character

NPC personality sliders (will your robot be flirty, moody, or feral?)

No object limits — build until your station can’t handle it

🚀 Why You’ll Love It Sci-Fi Builder is a sandbox of pure creative freedom. Construct space stations, experiment with alien societies, and push sci-fi imagination to the limit. There’s no story, no endgame — just infinite building, roleplay, and weird cosmic fun.

So suit up, space architect — your colony awaits.

Games like Sci-fi builder

See all
Startopia

Startopia

A once thriving network of space stations and planets have been left lifeless, redundant scars of the apocalypse.

91% of 845 Steam reviews are positivePlayers online now: 5$6.99
Galaxy Pass Station

Galaxy Pass Station

Build a space station for 15 alien races! 👽 Inspect IDs, catch criminals, and manage a chaotic galactic hub.

84% of 244 Steam reviews are positive$11.99
The Spatials: Galactology

The Spatials: Galactology

The Spatials are back with Galactology! Design, build and protect your colony station from the many enemies you will make while exploring the galaxy…

68% of 232 Steam reviews are positive$12.99
Astrobuilder

Astrobuilder

An AI-driven space management RPG in a living galaxy. Explore 150+ planets and interact with 600+ NPCs whose lives and relationships evolve over time.

88% of 354 Steam reviews are positive$14.99
Heliopolis Six

Heliopolis Six

Embark on a cosmic odyssey as the director of your own space station in a galaxy full of wonders.

53% of 32 Steam reviews are positive$17.99
Space Station Alpha

Space Station Alpha

Build and manage a space station in the outer reaches of space.

48% of 40 Steam reviews are positive$5.99
The Final Earth 2

The Final Earth 2

The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony.

97% of 421 Steam reviews are positivePlayers online now: 8$9.99
Astro Colony

Astro Colony

Set up conveyor networks, dock your stations and research new tech at your own pace, alone or with friends.

80% of 2,440 Steam reviews are positivePlayers online now: 106$19.99
Space Haven

Space Haven

Build a spaceship tile by tile, keep its air breathable and its crew fed, then jump it toward a new home.

85% of 10,433 Steam reviews are positivePlayers online now: 626$24.99
The Spatials

The Spatials

It's the year 5781 -- and you have been chosen to build and lead a space station in a wild corner of the galaxy!

67% of 256 Steam reviews are positive$9.99
Approximately Up

Approximately Up

Assemble a ship from thousands of parts, wire its systems together, and take it to fifteen strange planets, alone or with friends.

93% of 1,149 Steam reviews are positivePlayers online now: 86$18.74
Clip maker

Clip maker

Clip Maker is a creative tool for making videos, animations, visual novels, comics & VR scenes.

79% of 245 Steam reviews are positiveFree
Gang wars

Gang wars

Gang Wars is a fun cartoon arcade shooter! Defeat silly gangsters, collect coins, upgrade weapons, and clear 40 exciting levels full of fast action…

80% of 5 Steam reviews are positive$2.99
Photo Studio

Photo Studio

Photo Studio is a creative sandbox for photography, fashion, and dance.

55% of 11 Steam reviews are positive$9.99
Runaway bride

Runaway bride

Runaway Bride 👰‍♀️💨 is a funny escape arcade game! Help Rachel run from her chaotic wedding, dodge relatives, grab keys, and sprint through 10…

50% of 4 Steam reviews are positive$4.99
Bomber

Bomber

Bomber is a fun arcade puzzle game for kids and families. Blast walls, find hidden keys, collect power-ups, and complete 20 exciting levels full of…

0% of 3 Steam reviews are positive$4.99