Planet S A whole solar system to colonize

You start with a spaceship and just enough materials to land your first colony. From there, the solar system is the map: up to 24 procedurally generated planets, each with its own look, farm productivity and resources. A desert world and a green one will not feed your factories the same way, so which planets you grab first matters. Claiming an uncolonized one is simple: build a spaceport on it, and it joins your economy. The catch is that your first planet eventually runs out of room and resources, and expansion stops being optional. Every run generates a new system, so the map you fight over is never quite the same twice.

Your first residents are workers. When your civilization advances to the second tier, you make the choice that shapes the whole run: upgrade a city center's residents into scientists or into soldiers. Scientists generate research points for one tree, soldiers for another, and each tree unlocks its own bonuses and unique buildings. It is worth pausing over: the direction you pick here is the game you will be playing an hour later.

This is city building with a purpose. Residents arrive as workers, and attracting more of them means providing the goods they demand: at first food and basics, later things like screens, bread, cars and schools. Each new tier of residents unlocks new production chains, and those chains get more complex as your population grows. You lay out districts, balance housing, jobs and supply, and keep the whole machine fed. When one planet can no longer produce everything your people want, the city builder's answer is not a bigger city, it is a second world.