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.
