Games like Fantasy World Simulator
Games like Fantasy World Simulator include Slime Rancher, Internet Cafe Simulator 2, Two Point Museum, PC Building Simulator, and Totally Accurate Battle Simulator. We matched them by the tags players give Fantasy World Simulator on Steam (Simulation, Sandbox, Life Sim, City Builder, and FPS): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Exploration · Sandbox · Simulation

Internet Cafe Simulator 2
Shared: Simulation · Exploration · Sandbox

Two Point Museum
Shared: Simulation · Sandbox · City Builder

PC Building Simulator
Shared: Simulation · Sandbox · Immersive Sim

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Strategy

Disney Dreamlight Valley
Shared: Life Sim · Simulation · Sandbox

SuchArt: Genius Artist Simulator
Shared: Sandbox · Immersive Sim · FPS

Cities: Skylines
Shared: Simulation · City Builder · Sandbox

GoreBox
Shared: Sandbox · FPS · Simulation

Garry's Mod
Shared: Sandbox · Simulation · FPS

PowerWash Simulator
Shared: Simulation · Sandbox · 3D

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

SPORE™
Shared: Sandbox · Simulation · Exploration

Planet Coaster 2
Shared: Simulation · Sandbox · City Builder

Wobbledogs
Shared: Sandbox · Simulation · Life Sim

Hello Kitty Island Adventure
Shared: Simulation · Life Sim · Exploration

inZOI
Shared: Simulation · Life Sim · Sandbox

Project Silverfish
Shared: Sandbox · FPS · Exploration

Planet Coaster
Shared: Simulation · Sandbox · Family Friendly

Supermarket Simulator
Shared: Simulation · Life Sim · Immersive Sim

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

Crossroads Inn Anniversary Edition
Shared: City Builder · Life Sim · Immersive Sim

Slime Rancher 2
Shared: Simulation · Cute · First-Person

Townscaper
Shared: Sandbox · City Builder · Simulation