Games like Civatlas
Games like Civatlas include Banished, Foundation, Farthest Frontier, Manor Lords, and Kingdoms and Castles. We matched them by the tags players give Civatlas on Steam (Medieval, City Builder, Sandbox, Historical, and Colony Sim): closest matches first, and among equally close ones the better-known games.

Banished
Shared: City Builder · Colony Sim · Medieval

Foundation
Shared: City Builder · Medieval · Sandbox

Farthest Frontier
Shared: City Builder · Medieval · Resource Management

Manor Lords
Shared: City Builder · Historical · Sandbox

Kingdoms and Castles
Shared: City Builder · Colony Sim · Resource Management

Ostriv
Shared: City Builder · Historical · Colony Sim

The Universim
Shared: City Builder · Sandbox · Colony Sim

Cities: Skylines
Shared: City Builder · Sandbox · Resource Management

Dawn of Man
Shared: City Builder · Colony Sim · Historical

Workers & Resources: Soviet Republic
Shared: City Builder · Historical · Sandbox

Against the Storm
Shared: City Builder · Resource Management · Colony Sim

Prison Architect
Shared: Sandbox · Colony Sim · City Builder

Life is Feudal: Forest Village
Shared: City Builder · Medieval · Colony Sim

Settlement Survival
Shared: City Builder · Colony Sim · Sandbox

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

Empires of the Undergrowth
Shared: City Builder · Colony Sim · Sandbox

WorldBox - God Simulator
Shared: Sandbox · Colony Sim · God Game

Stronghold: Definitive Edition
Shared: City Builder · Medieval · Sandbox

Crusader Kings III
Shared: Medieval · Historical · Sandbox

Dwarf Fortress
Shared: Colony Sim · City Builder · Sandbox

Anno 1800
Shared: City Builder · Sandbox · Resource Management

Stronghold Crusader HD (2012)
Shared: City Builder · Medieval · Colony Sim

Norland
Shared: City Builder · Colony Sim · Resource Management

Stronghold Crusader: Definitive Edition
Shared: City Builder · Medieval · Colony Sim