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

Prison Architect
Shared: Simulation · Strategy · Colony Sim

Cities: Skylines
Shared: Simulation · City Builder · Strategy

Manor Lords
Shared: Strategy · Simulation · City Builder

Banished
Shared: Strategy · Colony Sim · City Builder

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

Frostpunk
Shared: Strategy · City Builder · Colony Sim

Planet Coaster 2
Shared: Simulation · Strategy · City Builder

Against the Storm
Shared: Strategy · Simulation · City Builder

Ostriv
Shared: Strategy · Simulation · City Builder

Foundation
Shared: Simulation · Strategy · City Builder

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

Dwarf Fortress
Shared: Colony Sim · Simulation · Strategy

RimWorld
Shared: Colony Sim · Strategy · Simulation

Space Haven
Shared: Colony Sim · Strategy · Simulation

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

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

Planetbase
Shared: Colony Sim · City Builder · Strategy

IXION
Shared: Strategy · City Builder · Colony Sim

Planet Coaster
Shared: Simulation · Strategy · Building

Settlement Survival
Shared: City Builder · Colony Sim · Simulation

Norland
Shared: Strategy · Simulation · City Builder

Cliff Empire
Shared: Strategy · Simulation · City Builder

The Universim
Shared: Colony Sim · City Builder · Strategy

Farthest Frontier
Shared: Strategy · City Builder · Colony Sim

