Games like Frontera
Games like Frontera include Prison Architect, Kingdoms and Castles, Cities: Skylines, Manor Lords, and Dwarf Fortress. We matched them by the tags players give Frontera on Steam (Simulation, City Builder, Colony Sim, Building, and Economy): closest matches first, and among equally close ones the better-known games.

Prison Architect
Shared: Simulation · Building · Colony Sim

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

Cities: Skylines
Shared: Simulation · City Builder · Building

Manor Lords
Shared: City Builder · Simulation · Building

Dwarf Fortress
Shared: Colony Sim · Simulation · City Builder

Banished
Shared: City Builder · Colony Sim · Simulation

Oxygen Not Included
Shared: Colony Sim · Building · Simulation

Against the Storm
Shared: Simulation · City Builder · Building

Frostpunk
Shared: City Builder · Colony Sim · Building

Workers & Resources: Soviet Republic
Shared: City Builder · Simulation · Building

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

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

Foundation
Shared: Simulation · City Builder · Building

Farthest Frontier
Shared: City Builder · Building · Economy

Norland
Shared: Simulation · City Builder · Colony Sim

Ostriv
Shared: City Builder · Simulation · Colony Sim

Captain of Industry
Shared: Simulation · Economy · City Builder

Pharaoh™: A New Era
Shared: City Builder · Simulation · Building

Settlement Survival
Shared: City Builder · Colony Sim · Building

Stonehearth
Shared: City Builder · Colony Sim · Building

Gnomoria
Shared: Colony Sim · City Builder · Simulation

Jurassic World Evolution
Shared: Simulation · Building · City Builder

Academia : School Simulator
Shared: City Builder · Colony Sim · Simulation

RimWorld
Shared: Colony Sim · Simulation · Strategy