One game like Castle Story is Stonehearth. It has similar aspects where you build and manage a settlement. You have to take care of your villagers, build structures, and gather resources. Another one could be Gnomoria. In this game, you control gnomes and create an underground kingdom. You also deal with resource management and building various facilities. And then there's RimWorld, which involves colonist management, building bases, and surviving in a harsh environment.
Well, Oxygen Not Included is quite similar to Castle Story. In it, you manage a colony of duplicants underground, dealing with resource gathering, base building, and keeping your little guys alive. There's also Banished. Here, you lead a group of exiles and build a town from scratch. You need to consider food production, housing, and the well - being of your people, much like in Castle Story. Additionally, Frostpunk has elements in common. You're in charge of a city in a frozen world, making tough decisions about resources and survival.
Factorio is a game that shares some similarities with Castle Story. You start with basic resources and gradually build up a large factory complex. Resource management and expansion are key aspects. Another option is Surviving Mars. Just like in Castle Story where you build a settlement, in this game, you build a colony on Mars. You have to deal with the unique challenges of the Martian environment, such as lack of oxygen and extreme temperatures. Also, Tropico series can be considered. You build and rule an island nation, handling economy, construction, and the needs of your citizens.