Garry's Mod — The physics sandbox game

A physics based sandbox game built on a modified version of Valve’s Source Engine

Garry's Mod Computers Play Their Own Games Inside Your Game

Fun-Motion » Do Whatever You Like in Garry's Mod

I collected the feedback of the custom game cover that I posted

First gameplay pictures image - Physics Sandbox - ModDB

Sandbox, the Garry's Mod successor, appears to have resumed

Physics Sandbox VR on Steam

Gameplay Gmod android (GUN MOD) PHYSICS SANDBOX!

Garry's Mod Game - Keymailer

Garry's Mod — The physics sandbox game