Games like My Joyful Aquarium
Games like My Joyful Aquarium include Slime Rancher, Passpartout: The Starving Artist, Game Dev Tycoon, Potion Craft: Alchemist Simulator, and Megaquarium. We matched them by the tags players give My Joyful Aquarium on Steam (Casual, Simulation, Hand-drawn, Cute, and Underwater): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Cute · Simulation · Casual

Passpartout: The Starving Artist
Shared: Casual · Simulation · Hand-drawn

Game Dev Tycoon
Shared: Simulation · Casual · Management

Potion Craft: Alchemist Simulator
Shared: Simulation · Casual · 2D

Megaquarium
Shared: Casual · Simulation · Sandbox

Two Point Museum
Shared: Casual · Simulation · Sandbox

MyVoiceZoo
Shared: Casual · Simulation · Cute

Organized Inside
Shared: Casual · Simulation · Cute

Cat Goes Fishing
Shared: Cute · Casual · 2D

Minami Lane
Shared: Casual · Cute · Simulation

鬼谷八荒 Tale of Immortal
Shared: Simulation · Sandbox · Management

DAVE THE DIVER
Shared: Casual · Underwater · Simulation

CHUCHEL
Shared: Casual · Cute · Cartoon

Planet Zoo
Shared: Simulation · Sandbox · Management

Shelldiver
Shared: Casual · Simulation · 2D

Papa's Freezeria Deluxe
Shared: Simulation · Casual · Time Management

SPORE™
Shared: Simulation · Sandbox · Casual

Two Point Hospital
Shared: Simulation · Casual · Sandbox

Wobbledogs
Shared: Cute · Simulation · Sandbox

Shawarma Legend
Shared: Simulation · 2D · Cartoon

Insaniquarium Deluxe
Shared: Casual · Underwater · Simulation

Sticky Business
Shared: Casual · Simulation · Cute

Equilinox
Shared: Simulation · Casual · Sandbox

Feed and Grow: Fish
Shared: Simulation · Underwater · Sandbox