Games like Theme Park Architect
Games like Theme Park Architect include PC Building Simulator, Cities: Skylines, Cities: Skylines II, Planet Coaster, and Garry's Mod. We matched them by the tags players give Theme Park Architect on Steam (Realistic, Simulation, Sandbox, Early Access, and Building): closest matches first, and among equally close ones the better-known games.

PC Building Simulator
Shared: Simulation · Building · Sandbox

Cities: Skylines
Shared: Simulation · Building · Sandbox

Cities: Skylines II
Shared: Simulation · Sandbox · Building

Planet Coaster
Shared: Simulation · Sandbox · Building

Garry's Mod
Shared: Sandbox · Building · Simulation

Supermarket Simulator
Shared: Simulation · Management · Building

House Flipper
Shared: Simulation · Building · Sandbox

BeamNG.drive
Shared: Simulation · Realistic · Sandbox

Automation - The Car Company Tycoon Game
Shared: Simulation · Sandbox · Realistic

Planet Zoo
Shared: Simulation · Management · Sandbox

Gas Station Simulator
Shared: Simulation · Management · Building

Farming Simulator 25
Shared: Simulation · Realistic · 3D

Cooking Simulator
Shared: Simulation · Realistic · Sandbox

DrainSim
Shared: Simulation · Sandbox · Realistic

The Sims™ 4
Shared: Simulation · Building · Sandbox

Internet Cafe Simulator 2
Shared: Simulation · Management · Sandbox

Planet Coaster 2
Shared: Simulation · Sandbox · Building

inZOI
Shared: Simulation · Realistic · Building

Car Mechanic Simulator 2018
Shared: Simulation · Realistic · Building

PowerWash Simulator
Shared: Simulation · Casual · Sandbox

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Realistic

Car Mechanic Simulator 2021
Shared: Simulation · Realistic · Sandbox

RollerCoaster Tycoon World™
Shared: Simulation · Building · Sandbox

My Summer Car
Shared: Simulation · Realistic · Building