Games like Grid Realm
Games like Grid Realm include Cities: Skylines, Garry's Mod, Cities: Skylines II, Townscaper, and SimCity™ 4 Deluxe Edition. We matched them by the tags players give Grid Realm on Steam (Casual, Simulation, City Builder, Minimalist, and Moddable): closest matches first, and among equally close ones the better-known games.

Cities: Skylines
Shared: Simulation · City Builder · Sandbox

Garry's Mod
Shared: Moddable · Sandbox · Casual

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

Townscaper
Shared: Casual · City Builder · Sandbox

SimCity™ 4 Deluxe Edition
Shared: City Builder · Sandbox · Simulation

Dorfromantik
Shared: Casual · City Builder · Simulation

PowerWash Simulator
Shared: Casual · Simulation · Sandbox

PC Building Simulator
Shared: Simulation · Sandbox · Immersive Sim

Mini Motorways
Shared: Simulation · Casual · Minimalist

My Dream Setup
Shared: Simulation · Casual · Sandbox

Planet Coaster 2
Shared: Simulation · City Builder · Sandbox

Two Point Museum
Shared: Casual · Simulation · City Builder

House Flipper
Shared: Simulation · Casual · Sandbox

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

Foundation
Shared: Simulation · City Builder · Sandbox

Besiege
Shared: Simulation · Sandbox · Moddable

Prison Architect
Shared: Simulation · Sandbox · City Builder

WorldBox - God Simulator
Shared: Simulation · Sandbox · God Game

TheoTown
Shared: Simulation · City Builder · Sandbox

MMORPG Tycoon 2
Shared: City Builder · Sandbox · Simulation

SUMMERHOUSE
Shared: Casual · Sandbox · City Builder

The Sims™ 3
Shared: Simulation · Casual · Sandbox

SPORE™
Shared: Simulation · Sandbox · Casual

Planet Zoo 2
Shared: Simulation · Casual · City Builder

