Games like Oceanarium World
Games like Oceanarium World include Cities: Skylines, Manor Lords, Cities: Skylines II, Prison Architect, and Against the Storm. We matched them by the tags players give Oceanarium World on Steam (Simulation, Strategy, City Builder, Creature Collector, and Management): closest matches first, and among equally close ones the better-known games.

Cities: Skylines
Shared: Simulation · City Builder · Strategy

Manor Lords
Shared: Strategy · Simulation · City Builder

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

Prison Architect
Shared: Simulation · Strategy · City Builder

Against the Storm
Shared: Simulation · Strategy · City Builder

Planet Zoo
Shared: Simulation · Management · City Builder

Kingdoms and Castles
Shared: City Builder · Simulation · Strategy

Foundation
Shared: Simulation · City Builder · Strategy

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

Jurassic World Evolution
Shared: Simulation · Strategy · Management

Jurassic World Evolution 2
Shared: Simulation · Management · Strategy

Anno 1800
Shared: Strategy · Simulation · City Builder

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

Frostpunk
Shared: City Builder · Strategy · Resource Management

Transport Fever 2
Shared: Simulation · Strategy · Management

Planet Coaster
Shared: Simulation · Management · Strategy

Let's Build a Zoo
Shared: Simulation · City Builder · Management

Norland
Shared: Simulation · Strategy · City Builder

RimWorld
Shared: Strategy · Simulation · Management

Banished
Shared: City Builder · Strategy · Simulation

Dyson Sphere Program
Shared: Simulation · Resource Management · Base Building

Planet Coaster 2
Shared: Simulation · Strategy · City Builder

Oxygen Not Included
Shared: Resource Management · Base Building · Management

Tropico 6
Shared: Strategy · Simulation · City Builder