Games like Ruinarch
Games like Ruinarch include Prison Architect, RimWorld, Oxygen Not Included, Manor Lords, and Kingdoms and Castles. We matched them by the tags players give Ruinarch on Steam (God Game, Villain Protagonist, Base Building, Colony Sim, and Simulation): closest matches first, and among equally close ones the better-known games.
Prison Architect
Shared: Simulation · Base Building · Colony Sim
RimWorld
Shared: Base Building · Colony Sim · Sandbox
Oxygen Not Included
Shared: Base Building · Colony Sim · Building
Manor Lords
Shared: Base Building · Simulation · City Builder
Kingdoms and Castles
Shared: Colony Sim · City Builder · Simulation
Dwarf Fortress
Shared: Base Building · Colony Sim · Simulation
Against the Storm
Shared: Base Building · Simulation · City Builder
Empires of the Undergrowth
Shared: Base Building · Simulation · Colony Sim
WorldBox - God Simulator
Shared: God Game · Simulation · Colony Sim
Banished
Shared: Colony Sim · City Builder · Simulation
The Universim
Shared: God Game · Colony Sim · City Builder
Foundation
Shared: Simulation · City Builder · Sandbox
Workers & Resources: Soviet Republic
Shared: Base Building · Simulation · City Builder
Timberborn
Shared: Colony Sim · City Builder · Sandbox
Cities: Skylines
Shared: Simulation · City Builder · Building
Norland
Shared: Base Building · Simulation · Colony Sim
Settlement Survival
Shared: Colony Sim · City Builder · Building
Space Haven
Shared: Base Building · Colony Sim · Simulation
Frostpunk
Shared: City Builder · Colony Sim · Base Building
Ostriv
Shared: City Builder · Simulation · Colony Sim
Sapiens
Shared: God Game · Colony Sim · Base Building
Dyson Sphere Program
Shared: Base Building · Building · Simulation
Endzone - A World Apart
Shared: City Builder · Base Building · Simulation
Songs of Syx
Shared: Colony Sim · City Builder · Base Building