Metabolis is a city builder about the flow of matter. It looks cozy and low-poly — but underneath, a real hydrodynamic simulation is doing the work.

Water is really simulated

Rivers run through their valleys, swell with rain and shrink in dry spells. Your city plumbing lives on the same physics.

• Pump from the river, run it through purification plants, deliver it to town. Supply obeys gravity and head — high ground needs pump stations
  
• Sewage flows downhill to treatment plants. Release it untreated, and the whole river downstream turns foul
  
• Draw from a polluted river and the contamination rides your own pipes back into town, spreading disease. Every cause has an address

Infrastructure gates your growth

Eight stages from hamlet to metropolis — and each stage adds infrastructure your city cannot grow without.

• Thermal plants are powerful but dirty; wind is clean but lives at the mercy of the weather. Extend the grid with power lines and substations
  
• Shortages show up as brownouts — not as a number, but as windows going dark
  
• A sandbox economy of taxes, budget and residential/commercial/industrial demand

Traffic moves one car at a time

• Every vehicle is an agent: it picks lanes, negotiates signals and intersections, and pulls into its destination lot
  
• Headlights sweep the roads at night while pedestrians walk the sidewalks
  
• Fires, disease and crime send responders racing to the scene — through whatever traffic you built

Terrain and weather

• Wide seed-generated maps with rivers, lakes, sea and hills — plus terraforming tools
  
• Rain and storm cycles move river levels and wind-power output
  
• A full day/night cycle: long dusk shadows, lit windows after dark

Photo mode

• A free camera that goes anywhere, with day, dusk and night presets
  
• Bloom + filmic tone mapping, starry skies, one-key screenshots

Everything you release flows somewhere. Design your city's metabolism.