Games like Beyond These Stars
Games like Beyond These Stars include RimWorld, Manor Lords, Prison Architect, Oxygen Not Included, and Cities: Skylines. We matched them by the tags players give Beyond These Stars on Steam (Strategy, Simulation, City Builder, Base Building, and Colony Sim): closest matches first, and among equally close ones the better-known games.

RimWorld
Shared: Strategy · Base Building · Colony Sim

Manor Lords
Shared: Strategy · Simulation · City Builder

Prison Architect
Shared: Simulation · Strategy · Base Building

Oxygen Not Included
Shared: Base Building · Colony Sim · Building

Cities: Skylines
Shared: Simulation · City Builder · Strategy

Against the Storm
Shared: Strategy · Simulation · City Builder

Kingdoms and Castles
Shared: City Builder · Simulation · Colony Sim

Frostpunk
Shared: City Builder · Strategy · Colony Sim

Workers & Resources: Soviet Republic
Shared: Strategy · Simulation · City Builder

Empires of the Undergrowth
Shared: Strategy · Simulation · City Builder

Dwarf Fortress
Shared: Simulation · Strategy · Base Building

Factorio
Shared: Base Building · Strategy · Sandbox

Dyson Sphere Program
Shared: Base Building · Simulation · Building

Banished
Shared: Strategy · City Builder · Simulation

Norland
Shared: Strategy · Simulation · City Builder

Cities: Skylines II
Shared: Simulation · City Builder · Building

Foundation
Shared: Simulation · City Builder · Strategy

Jurassic World Evolution
Shared: Simulation · Strategy · Building

Space Haven
Shared: Strategy · Base Building · Colony Sim

Jurassic World Evolution 2
Shared: Simulation · Building · Strategy

Timberborn
Shared: City Builder · Colony Sim · Building

Ostriv
Shared: Strategy · City Builder · Simulation

Settlement Survival
Shared: City Builder · Colony Sim · Simulation

Captain of Industry
Shared: Simulation · Strategy · Base Building