Games like Coloniam
Games like Coloniam include Reus, Totally Accurate Battle Simulator, Banished, Foundation, and Startup Company. We matched them by the tags players give Coloniam on Steam (Strategy, Indie, Simulation, Early Access, and God Game): closest matches first, and among equally close ones the better-known games.

Reus
Shared: Strategy · Indie · Simulation

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Sandbox

Banished
Shared: Strategy · Simulation · Indie

Foundation
Shared: Simulation · Strategy · Sandbox

Startup Company
Shared: Simulation · Strategy · Indie

Cities: Skylines
Shared: Simulation · Strategy · Sandbox

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

Ages of Conflict: World War Simulator
Shared: Simulation · God Game · Sandbox

Kingdoms and Castles
Shared: Strategy · Simulation · Resource Management

Game Dev Tycoon
Shared: Indie · Simulation · Strategy

Ultimate Epic Battle Simulator 2
Shared: Strategy · Simulation · Sandbox

The Scroll of Taiwu : Beyond The Dome
Shared: Strategy · Indie · Sandbox

Manor Lords
Shared: Strategy · Simulation · Sandbox

Doodle Empires
Shared: Strategy · Simulation · Indie

Automation - The Car Company Tycoon Game
Shared: Simulation · Strategy · Sandbox

WorldBox - God Simulator
Shared: Simulation · God Game · Sandbox

Townsmen VR
Shared: Strategy · Simulation · Indie

Prison Architect
Shared: Simulation · Strategy · Sandbox

Cities: Skylines II
Shared: Simulation · Strategy · Sandbox

Ultimate Epic Battle Simulator
Shared: Simulation · Strategy · Sandbox

Ostriv
Shared: Strategy · Simulation · Resource Management

SPORE™
Shared: God Game · Simulation · Sandbox

Transport Fever 2
Shared: Strategy · Simulation · Sandbox

Rise to Ruins
Shared: Strategy · Simulation · Indie