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

Prison Architect
Shared: Simulation · Strategy · Colony Sim

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

Banished
Shared: City Builder · Strategy · Simulation

Cities: Skylines
Shared: Simulation · City Builder · Strategy

Manor Lords
Shared: Strategy · Simulation · City Builder

Foundation
Shared: Simulation · City Builder · Strategy

Against the Storm
Shared: Simulation · Strategy · City Builder

Dwarf Fortress
Shared: Simulation · Colony Sim · Strategy

Settlement Survival
Shared: City Builder · Colony Sim · Simulation

Oxygen Not Included
Shared: Colony Sim · Simulation · 2D

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

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

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

Cliff Empire
Shared: Strategy · Simulation · City Builder

Frostpunk
Shared: City Builder · Strategy · Colony Sim

RimWorld
Shared: Colony Sim · Strategy · Simulation

Surviving Mars: Relaunched
Shared: Simulation · Strategy · City Builder

Ostriv
Shared: Strategy · Simulation · City Builder

IXION
Shared: Strategy · City Builder · Colony Sim

Farthest Frontier
Shared: Strategy · City Builder · Building

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

Stonehearth
Shared: City Builder · Colony Sim · Strategy

Anno 1800
Shared: Strategy · Simulation · City Builder

TheoTown
Shared: Simulation · City Builder · Strategy