Games like MicroTown
Games like MicroTown include Kingdoms and Castles, Foundation, Banished, Prison Architect, and Manor Lords. We matched them by the tags players give MicroTown on Steam (City Builder, Colony Sim, Base Building, Resource Management, and Medieval): closest matches first, and among equally close ones the better-known games.

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

Foundation
Shared: City Builder · Medieval · Sandbox

Banished
Shared: City Builder · Colony Sim · Strategy

Prison Architect
Shared: Base Building · Colony Sim · Sandbox

Manor Lords
Shared: City Builder · Base Building · Strategy

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

RimWorld
Shared: Colony Sim · Base Building · Sandbox

Kingdoms Reborn
Shared: City Builder · Colony Sim · Base Building

Farthest Frontier
Shared: City Builder · Resource Management · Medieval

Dwarf Fortress
Shared: Colony Sim · Base Building · City Builder

Frostpunk
Shared: City Builder · Resource Management · Colony Sim

Ostriv
Shared: City Builder · Colony Sim · Strategy

Against the Storm
Shared: City Builder · Base Building · Strategy

Going Medieval
Shared: Colony Sim · Base Building · City Builder

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

Timberborn
Shared: City Builder · Colony Sim · Sandbox

Settlement Survival
Shared: City Builder · Colony Sim · Management

Workers & Resources: Soviet Republic
Shared: City Builder · Base Building · Strategy

Empires of the Undergrowth
Shared: City Builder · Base Building · Colony Sim

Cities: Skylines
Shared: City Builder · Management · Sandbox

Norland
Shared: City Builder · Base Building · Colony Sim

Songs of Syx
Shared: City Builder · Colony Sim · Base Building

Captain of Industry
Shared: Base Building · Resource Management · City Builder

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