Games like Hexity
Games like Hexity include Kingdoms and Castles, Banished, Foundation, Frostpunk, and Manor Lords. We matched them by the tags players give Hexity on Steam (Simulation, Strategy, City Builder, Colony Sim, and RTS): closest matches first, and among equally close ones the better-known games.

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

Banished
Shared: City Builder · Strategy · Simulation

Foundation
Shared: Simulation · City Builder · Strategy

Frostpunk
Shared: City Builder · Strategy · Colony Sim

Manor Lords
Shared: Strategy · Simulation · City Builder

Cities: Skylines
Shared: Simulation · City Builder · Strategy

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

IXION
Shared: Strategy · City Builder · Colony Sim

Prison Architect
Shared: Simulation · Strategy · Colony Sim

Against the Storm
Shared: Simulation · Strategy · City Builder

Anno 1800
Shared: Strategy · Simulation · City Builder

Anno 117: Pax Romana
Shared: Strategy · Simulation · City Builder

Ostriv
Shared: Strategy · Simulation · City Builder

Settlement Survival
Shared: City Builder · Colony Sim · Simulation

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

Planet Coaster
Shared: Simulation · Strategy · Building

Dwarf Fortress
Shared: Simulation · Colony Sim · Strategy

Stonehearth
Shared: City Builder · Colony Sim · Strategy

Tavern Master
Shared: Simulation · Strategy · City Builder

Farthest Frontier
Shared: Strategy · City Builder · Building

Empires of the Undergrowth
Shared: Simulation · Strategy · City Builder

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

Norland
Shared: Simulation · Strategy · City Builder

The Wandering Village
Shared: Simulation · City Builder · Colony Sim

