Games like Topiopolis
Games like Topiopolis include Dorfromantik, Mini Motorways, Cities: Skylines, Librarian: Tidy Up the Arcane Library!, and Cities: Skylines II. We matched them by the tags players give Topiopolis on Steam (Simulation, Casual, Puzzle, City Builder, and 3D): closest matches first, and among equally close ones the better-known games.

Dorfromantik
Shared: Puzzle · Casual · City Builder

Mini Motorways
Shared: Simulation · Casual · Puzzle

Cities: Skylines
Shared: Simulation · City Builder · Singleplayer

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Puzzle · Simulation

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

PowerWash Simulator
Shared: Casual · Simulation · 3D

Banished
Shared: Simulation · City Builder · Singleplayer

Ballads of Hongye: REBORN
Shared: Casual · Simulation · City Builder

Potion Craft: Alchemist Simulator
Shared: Simulation · Singleplayer · Medieval

Unpacking
Shared: Casual · Puzzle · Simulation

Foundation
Shared: Simulation · City Builder · Medieval

Mini Metro
Shared: Puzzle · Simulation · Casual

Freeways
Shared: Simulation · Puzzle · Casual

Planet Coaster 2
Shared: Simulation · City Builder · 3D

Crazy Machines 3
Shared: Simulation · Puzzle · Casual

House Flipper
Shared: Simulation · Singleplayer · Casual

PC Building Simulator
Shared: Simulation · 3D · Casual

Tavern Master
Shared: Simulation · Medieval · City Builder

Papers, Please
Shared: Simulation · Puzzle · Singleplayer

Transport Fever 3
Shared: Simulation · Casual · City Builder

Pixel Puzzles: Japan
Shared: Casual · Puzzle · Simulation

Just Go
Shared: Simulation · Casual · Puzzle

Car Mechanic Simulator 2021
Shared: Simulation · Singleplayer · 3D

Poly Bridge 3
Shared: Simulation · Puzzle · 3D