Games like marblebuilds
Games like marblebuilds include Garry's Mod, People Playground, Poly Bridge, Bridge Constructor Portal, and Poly Bridge 2. We matched them by the tags players give marblebuilds on Steam (Sandbox, Physics, Building, Logic, and Minimalist): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Physics · Building

People Playground
Shared: Sandbox · Physics · 2D

Poly Bridge
Shared: Physics · Building · Sandbox

Bridge Constructor Portal
Shared: Physics · Building · Simulation

Poly Bridge 2
Shared: Physics · Building · Sandbox

Kerbal Space Program
Shared: Sandbox · Physics · Simulation

Space Engineers
Shared: Sandbox · Building · Physics

Besiege
Shared: Sandbox · Physics · Simulation

Totally Accurate Battle Simulator
Shared: Sandbox · Physics · Simulation

Zup! S
Shared: Physics · 2D · Indie

Crazy Machines 3
Shared: Physics · Sandbox · Simulation

Cities: Skylines
Shared: Building · Sandbox · Simulation

Prison Architect
Shared: Sandbox · Building · Simulation

Baba Is You
Shared: Logic · Indie · Singleplayer

Mini Metro
Shared: Minimalist · Simulation · Singleplayer

Opus Magnum
Shared: Logic · Simulation · Indie

Scrap Mechanic
Shared: Sandbox · Building · Physics

Oxygen Not Included
Shared: Building · Sandbox · 2D

Teardown
Shared: Physics · Sandbox · Singleplayer

House Flipper
Shared: Sandbox · Building · Simulation

Mini Motorways
Shared: Simulation · Minimalist · Building

Geometry Dash
Shared: Level Editor · 2D · Singleplayer

Forts
Shared: Physics · Sandbox · Building

Cities: Skylines II
Shared: Sandbox · Building · Simulation