Games like Mermaid Colony
Games like Mermaid Colony include Oxygen Not Included, RimWorld, Cities: Skylines, Prison Architect, and Banished. We matched them by the tags players give Mermaid Colony on Steam (Indie, Simulation, Strategy, Underwater, and Management): closest matches first, and among equally close ones the better-known games.
Oxygen Not Included
Shared: Survival · Building · Management
RimWorld
Shared: Strategy · Survival · Management
Cities: Skylines
Shared: Simulation · Strategy · Management
Prison Architect
Shared: Simulation · Building · Strategy
Banished
Shared: Strategy · Simulation · Indie
Foundation
Shared: Simulation · Strategy · Management
Manor Lords
Shared: Strategy · Simulation · Management
Cities: Skylines II
Shared: Simulation · Building · Management
Jurassic World Evolution
Shared: Simulation · Building · Strategy
Frostpunk
Shared: Strategy · Survival · Building
Against the Storm
Shared: Simulation · Strategy · Building
Jurassic World Evolution 2
Shared: Simulation · Management · Building
Endzone - A World Apart
Shared: Strategy · Simulation · Indie
Kingdoms and Castles
Shared: Simulation · Management · Strategy
Factorio
Shared: Strategy · Sandbox · Management
This War of Mine
Shared: Strategy · Survival · Simulation
Game Dev Tycoon
Shared: Simulation · Indie · Management
Dwarf Fortress
Shared: Simulation · Strategy · Management
Two Point Hospital
Shared: Simulation · Management · Building
Planet Coaster
Shared: Simulation · Management · Building
Tavern Master
Shared: Simulation · Management · Indie
Workers & Resources: Soviet Republic
Shared: Strategy · Simulation · Building
Project Highrise
Shared: Simulation · Management · Strategy
Ostriv
Shared: Simulation · Strategy · Management