Games like The Universim
Games like The Universim include Oxygen Not Included, RimWorld, Banished, Kingdoms and Castles, and Cities: Skylines. We matched them by the tags players give The Universim on Steam (City Builder, Colony Sim, God Game, Sandbox, and Building): closest matches first, and among equally close ones the better-known games.

Oxygen Not Included
Shared: Colony Sim · Survival · Building

RimWorld
Shared: Colony Sim · Sandbox · Survival

Banished
Shared: City Builder · Colony Sim · Survival

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

Cities: Skylines
Shared: City Builder · Building · Sandbox

Frostpunk
Shared: City Builder · Colony Sim · Survival

Manor Lords
Shared: City Builder · Strategy · Building

Dwarf Fortress
Shared: Colony Sim · City Builder · Sandbox

Space Haven
Shared: Colony Sim · Survival · Sandbox

Prison Architect
Shared: Sandbox · Colony Sim · Building

Settlement Survival
Shared: City Builder · Colony Sim · Building

Timberborn
Shared: City Builder · Colony Sim · Sandbox

Against the Storm
Shared: City Builder · Building · Strategy

Stonehearth
Shared: City Builder · Colony Sim · Sandbox

Planetbase
Shared: City Builder · Colony Sim · Survival

Foundation
Shared: City Builder · Sandbox · Management

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

IXION
Shared: City Builder · Colony Sim · Space

Jurassic World Evolution
Shared: Building · City Builder · Sandbox

SPORE™
Shared: God Game · Colony Sim · Sandbox

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

Dyson Sphere Program
Shared: Building · Space · City Builder

Endzone - A World Apart
Shared: City Builder · Survival · Colony Sim

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