Games like Aquarist
Games like Aquarist include PC Building Simulator, House Flipper, Planet Coaster, Megaquarium, and Potion Craft: Alchemist Simulator. We matched them by the tags players give Aquarist on Steam (Simulation, Sandbox, Management, Fishing, and Indie): closest matches first, and among equally close ones the better-known games.

PC Building Simulator
Shared: Simulation · Management · Sandbox

House Flipper
Shared: Simulation · Sandbox · Relaxing

Planet Coaster
Shared: Simulation · Management · Sandbox

Megaquarium
Shared: Simulation · Sandbox · Management

Potion Craft: Alchemist Simulator
Shared: Simulation · Management · Relaxing

DAVE THE DIVER
Shared: Management · Casual · Fishing

Cities: Skylines
Shared: Simulation · Management · Sandbox

Gas Station Simulator
Shared: Simulation · Management · Casual

Mini Motorways
Shared: Simulation · Management · Casual

Garry's Mod
Shared: Sandbox · Casual · Simulation

Game Dev Tycoon
Shared: Simulation · Management · Indie

Supermarket Simulator
Shared: Simulation · Management · Singleplayer

Two Point Hospital
Shared: Simulation · Management · Sandbox

Cities: Skylines II
Shared: Simulation · Sandbox · Management

Planet Zoo
Shared: Simulation · Management · Sandbox

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

PowerWash Simulator
Shared: Simulation · Casual · Sandbox

Stardew Valley
Shared: Simulation · Sandbox · Relaxing

Let's School
Shared: Management · Simulation · Sandbox

Townscaper
Shared: Sandbox · Simulation · Relaxing

Electrician Simulator
Shared: Simulation · Education · Indie

The Sims™ 4
Shared: Simulation · Sandbox · Casual

Cooking Simulator
Shared: Simulation · Sandbox · Management

Startup Company
Shared: Simulation · Management · Sandbox