Harvest comes once a month.
Then somebody has to load it, drive it in and stack it on a shelf. A full barn out at the farm road feeds nobody in town.
A rainforest city-builder for PC · hand-built by one person
They have given you a valley, five hundred souls and one road into the trees. Every roof you raise comes out of that forest. How much of it will still be standing when your grandchildren inherit the place?
Rainforest Basin · Year 4 · population 1,180 and climbing.
Your first hundred days
Five hundred people came upriver on your word. They are sleeping under canvas at the landing while you decide where the town goes — which trees come down, where the first road runs, whether the mill gets built before the rain arrives. Everything that happens in this valley for the next two hundred years starts with what you draw this week.
The road to the first roof
This is the errand the whole valley turns on. Fell the stand. Get the logs out before the track floods. Feed the mill. Carry the timber to the plot where a family has been waiting since spring. Run it well and the town doubles. Run it badly and it stops where it stands.
FOREST EDGE · THE CUT
THE VALLEY SAYS · TIMBER ON THE GROUND
By evening there is a clearing where the canopy was, and the logs are lying in it. They are yours — but they are also four miles from anyone who needs them, and the forest floor is already going soft underfoot. Cut somewhere your lorries cannot reach and you have simply killed a stand of trees for nothing.
THE SECOND GENERATION
Two hundred years, one family at a time
A woman arrives on the first boat, takes work at the mill, marries a man from the farm road and raises two children in a house you approved. Those children grow up, and one of them ends up running the sawmill you founded. Nobody wrote that down in advance. It is simply what a valley does when you keep it worth living in.
Close the mill and watch her walk further every morning. Let the shop shelves empty and watch her family thin out. She will not complain to you about it. She will just quietly make the best of whatever you left her.
A door of their ownOne family, one address, one shared life.
The morning walkOn foot, by car, or on the bus you put there.
Something to eatFull shelves, or a long walk to nothing.The basin keeps its own accounts
Every hectare remembers what you did to it — the canopy you took, the soil you compacted, the water you fouled, the air above it. Jaguars need unbroken forest to hunt through. Harpy eagles need the tall trees you were eyeing for the new district. Cut a corridor in half and the animals on the far side simply stop being there, quietly, without a warning message.
DOWNWIND OF THE MILL
There is weather in this sky
Your steelworks throws black smoke. The sawmill adds its own. Out at the edge of town the water plant breathes clean white steam, and it is the only thing here that does. On a still morning it all just hangs over the rooftops. Then the wind gets up, and takes it somewhere.
Build the mill upwind of the houses and you have made a decision about somebody's bedroom window. Move it two streets and you have made a different one. When the wet season breaks, the rain pulls the whole lot out of the air and puts it in your river instead.
Smoke and steamOnly the water plant runs clean.
Wet season, dry seasonThe rain comes and goes all year.
What goes upComes down again, into the water.Word gets out beyond the basin
They do not appear out of thin air. They come up the same roads your own lorries use, in through the handful of entrances at the edge of the map, on foot, carrying what they own. Thirty-odd a day, once your town is worth the walk.
Your own people always get first refusal on every job. Only what nobody local wanted is offered to whoever walked in this morning. They take it, they move into temporary quarters, and for six months they are part of the town without being of it.
Then the contract ends — and about one in five asks to stay. Whether they can depends entirely on whether you ever got round to building somewhere for them to live. If you did, they become citizens: a home, a household, children who will grow up calling this valley theirs. If you did not, they walk back out the way they came in.
Then somebody has to load it, drive it in and stack it on a shelf. A full barn out at the farm road feeds nobody in town.
Neighbours downriver will buy your surplus and sell you what you lack — if your warehouse is stocked and your road is open.
It needs the timber carried to it, the money paid and a crew that turns up. Until then it is just rope and pegs in the mud.
Look closer
Open any of these full size and go hunting. The mud track worn between the clearing and the road. The loader standing over the pile it is working. The moment somebody steps off the kerb and the bus has to wait for them.
Run the valley your way
Wages, yields, how fast a roof rots, how quickly the forest returns — every rule this world runs on is yours to open and rewrite. No install, no account, no modding kit to buy.
Turn one number and see what falls over. Build the valley you actually want to live in, and play it tonight.
CREATOR · DESIGNER · FIRST-TIME GAME MAKER
One person. No studio. No budget.
A canvas flooded green. Blue rivers painted through it. The eraser used as a deforestation tool. That was the whole game, and Michal was a child. Years later he came back to the question underneath it: what if the forest actually mattered?
SOLESIDO is the answer — a city builder about living between the rainforest and everything we want to put on top of it, made alone, in a long and frequently humbling collaboration with AI.
Read the origin story →
The basin is finished. The people are in it. One man is still putting the last roofs on before it goes to Steam — and the day it opens, five hundred souls will be standing at the landing waiting for somebody to tell them where to build.
Windows · coming to Steam · made by one person
Be there for the first boat✉