Sci-fi builder
Downloadable Content
View all 17 DLCs →
Adult for Sci-fi builder
23 March, 2024
Adult for Sci-fi builder - additional beautiful female characters ready for having sex in your game in skimpy revealing outfits or completely nude

Anime for Sci-fi builder
23 March, 2024
Anime for Sci-fi builder - additional beautiful anime style female characters ready for having sex in your game in skimpy revealing outfits

Erotic fiction for Sci-fi builder
26 January, 2024
Erotic fiction for Sci-fi builder - additional beautiful female characters ready for making erotic shows in your game in skimpy revealing outfits

Fun with penis for Sci-fi builder
06 January, 2024
Fun with penis for Sci-fi builder - additional customizable handsome naked male characters with working genitals, and settings to make their penises even better.

Cyberpunk men for Sci-fi builder
04 November, 2023
Cyberpunk men for Sci-fi builder - additional customizable handsome undressable male characters with working genitals, and settings to make their bodies even better.

Cyberpunk women for Sci-fi builder
04 November, 2023
Cyberpunk women for Sci-fi builder - additional beautiful customizable female characters ready for having sex in your game
About this game
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.
Achievements
View all 33 →Sci-fi Task 33
18.7%Add light bulb
Sci-fi Task 28
19.3%Put object Portal 02
Sci-fi Task 29
19.3%Send an NPC through the portal
Sci-fi Task 30
19.3%Go through the portal
Sci-fi Task 31
19.3%Make NPC as cable expert
