Games like Darwin's Aquarium
Games like Darwin's Aquarium include Disney Dreamlight Valley, Stardew Valley, Planet Coaster, The Sims™ 4, and inZOI. We matched them by the tags players give Darwin's Aquarium on Steam (Artificial Intelligence, Life Sim, Realistic, 3D, and Relaxing): closest matches first, and among equally close ones the better-known games.

Disney Dreamlight Valley
Shared: Life Sim · Relaxing · Adventure

Stardew Valley
Shared: Life Sim · Relaxing · Simulation

Planet Coaster
Shared: Simulation · Sandbox · Relaxing

The Sims™ 4
Shared: Life Sim · Simulation · Sandbox

inZOI
Shared: Life Sim · Realistic · Simulation

Totally Accurate Battle Simulator
Shared: Sandbox · Simulation · Realistic

Fishing Planet
Shared: Relaxing · Realistic · Simulation

WorldBox - God Simulator
Shared: Sandbox · Life Sim · Artificial Intelligence

PowerWash Simulator
Shared: Relaxing · 3D · Simulation

PC Building Simulator
Shared: Simulation · Sandbox · 3D

Internet Cafe Simulator 2
Shared: 3D · Simulation · Life Sim

theHunter: Call of the Wild™
Shared: Relaxing · Realistic · Multiplayer

Euro Truck Simulator 2
Shared: Realistic · Simulation · Relaxing

SnowRunner
Shared: Simulation · Realistic · Adventure

BeamNG.drive
Shared: Realistic · Simulation · Sandbox

Farming Simulator 25
Shared: Realistic · 3D · Simulation

House Flipper
Shared: Simulation · Relaxing · Sandbox

Universe Sandbox
Shared: Sandbox · Realistic · Simulation

Finnish Cottage Simulator
Shared: 3D · Simulation · Realistic

Out of Ore
Shared: Realistic · Sandbox · Simulation

Planet Coaster 2
Shared: Sandbox · Simulation · 3D

Aniimo
Shared: Artificial Intelligence · Adventure · Multiplayer

Wobbly Life
Shared: Adventure · Sandbox · Simulation

Car Mechanic Simulator 2021
Shared: Realistic · Simulation · Sandbox