Games like Oxygen: First Breath
Games like Oxygen: First Breath include Frostpunk, Manor Lords, Oxygen Not Included, Kingdoms and Castles, and RimWorld. We matched them by the tags players give Oxygen: First Breath on Steam (Strategy, Base Building, City Builder, Simulation, and Survival): closest matches first, and among equally close ones the better-known games.
Frostpunk
Shared: City Builder · Strategy · Survival
Manor Lords
Shared: Strategy · City Builder · Base Building
Oxygen Not Included
Shared: Base Building · Survival · Colony Sim
Kingdoms and Castles
Shared: City Builder · Strategy · Simulation
RimWorld
Shared: Base Building · Strategy · Survival
Prison Architect
Shared: Simulation · Base Building · Strategy
Against the Storm
Shared: Strategy · City Builder · Base Building
Banished
Shared: Strategy · City Builder · Simulation
Cities: Skylines
Shared: City Builder · Simulation · Strategy
Dwarf Fortress
Shared: Base Building · Strategy · Simulation
Workers & Resources: Soviet Republic
Shared: Strategy · City Builder · Base Building
Empires of the Undergrowth
Shared: Strategy · Base Building · Simulation
Endzone - A World Apart
Shared: Strategy · City Builder · Survival
Foundation
Shared: City Builder · Strategy · Simulation
Ostriv
Shared: Strategy · City Builder · Simulation
IXION
Shared: Strategy · City Builder · Survival
Norland
Shared: Strategy · City Builder · Base Building
Frostpunk 2
Shared: Strategy · City Builder · Survival
Cities: Skylines II
Shared: City Builder · Simulation · Strategy
Factorio
Shared: Base Building · Strategy · Resource Management
Settlement Survival
Shared: City Builder · Survival · Simulation
Space Haven
Shared: Base Building · Strategy · Survival
Planetbase
Shared: Base Building · City Builder · Strategy
Captain of Industry
Shared: Base Building · Strategy · Simulation