Sculpt and grab
Raise mountain ranges, carve rivers, or grab a whole forest and drag it across the land.
Latest build v1.41 · Outpost
Sculpt a world.
Watch it come alive.
Asterra is a god game where everything is clay. Shape a planet with your hands, watch life crawl out of its seas, then follow it all the way out to the cosmic web without a single loading screen.
Go on, this whole page is clay.
Grab and flick to throw
Meteor · Black hole · Paint
Shift reverses
Ctrl+Z undoes
One world, every scale
From a single cell to the cosmic web.
One world, one camera, no loading screens. Every star and system grows from your world's seed the moment you arrive, and you can play at every step.
Cell
Dive into a tide pool and swim, bite and grow as a single cell.
Creature
Crawl ashore and roam the planet as your own species.
Tribe
Awaken a people. Gather, raid, dance, and win villages over.
City
Lay roads, zones, power and water right on the planet.
Planet
Sculpt the land, pour the seas, set the climate and the look.
Star system
Fly your own ship off the ground and on to other worlds.
Galaxy
Nine thousand stars, rival empires, colony ships and space battles.
Cosmic web
Zoom out past your galaxy and sculpt the web of galaxies itself.
Everything is clay
Real physics, and you can grab all of it.
Mountains, seas, moons, suns, whole galaxies: they all answer to your hand, and the world plays out whatever you did. So does this page. and scatter these cards.
Water that flows
Rain runs downhill into lakes, rivers and waterfalls, and the seas fill in, freeze or boil with the climate.
Weather and cataclysm
Seasons, storms, wildfire and cataclysms, all playing out on the ground you shaped.
Moons and worlds
Pull a moon down, smash two worlds together, or fling yours into deep space until a new sun catches it.
Clay cosmos
Grab, throw, grow and destroy suns and planets under real gravity.
Galaxies and the web
Scatter, gather and swirl whole galaxies. When two collide they merge, trailing tails and flinging stars.
The editors
Design it, and the world uses it.
Nothing you make sits in a menu. Species grow the bodies you design, peoples raise cities from your buildings, and empires fly your ships into battle.
Creatures→species that evolve
Life on your world grows real bodies from the creature editor and keeps adapting them to its land.
Humans and aliens→citizens
The people you design walk the sidewalks of your cities.
Buildings→cities in your style
Your halls, homes, works and playhouses become the cities your peoples raise.
Vehicles→fleets on land, sea and air
Armies, caravans and missionaries roll out in your designs, and you can take the wheel.
Starships and UFOs→the fleets in space
Empires fly your warships into battle across the galaxy.
Bases→outposts on any world
Floors, walls, habs, domes, beacons and landing pads, placed part by part.
Under the hood
One file. Same seed, same universe.
1file. Runs offline, no install, no server.
97test suites every release has to pass
0loading screens from cell to cosmic web
2.3 MBfor the entire game
Before an update ships, it's checked against the last one on eight test worlds, so new features can't quietly change how your old worlds play.
When something gets faster, it has to give exactly the same results as before. Your worlds run quicker, not differently.
Your turn.
This page can take it. Drop a meteor on the headline, swallow a paragraph, paint the cards.
Follow the build
Two moons orbit Asterra.
One carries the footage, the other the build log. Catch one.