Games like Exipelago
Games like Exipelago include Prison Architect, Timberborn, Banished, Kingdoms and Castles, and Stonehearth. We matched them by the tags players give Exipelago on Steam (Simulation, City Builder, Colony Sim, 3D, and Top-Down): closest matches first, and among equally close ones the better-known games.

Prison Architect
Shared: Simulation · Colony Sim · Building

Timberborn
Shared: City Builder · Colony Sim · Voxel

Banished
Shared: City Builder · Colony Sim · Simulation

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

Stonehearth
Shared: City Builder · Colony Sim · Simulation

Cities: Skylines
Shared: Simulation · City Builder · Building

Frostpunk
Shared: City Builder · Colony Sim · Survival

Manor Lords
Shared: City Builder · Simulation · Building

Dwarf Fortress
Shared: Colony Sim · Simulation · City Builder

Settlement Survival
Shared: City Builder · Colony Sim · Simulation

Ostriv
Shared: City Builder · Simulation · Colony Sim

Against the Storm
Shared: Simulation · City Builder · Building

Foundation
Shared: Simulation · City Builder · Building

Workers & Resources: Soviet Republic
Shared: City Builder · Simulation · Colony Sim

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

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

Tavern Master
Shared: Simulation · Building · City Builder

Oxygen Not Included
Shared: Colony Sim · Building · Simulation

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

RimWorld
Shared: Colony Sim · Simulation · Survival

Going Medieval
Shared: Colony Sim · City Builder · Voxel

Farthest Frontier
Shared: City Builder · Building · Colony Sim

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

Norland
Shared: Simulation · City Builder · Colony Sim