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

Buy Garry's Mod

“It brings back the silly glee of unbridled experimentation, intuitive learning and playful social interactions that most of us haven't experienced since childhood. For that, it's essential.”

PC Gamer

September 2026 Update

64-bit Windows builds, Sandbox improvements and many smaller changes

New mountable games, HUD improvements, content fixes, networking improvements and optimizations.

A small update fixing some regressions of the November Update.

Create constructions with moving parts. Create a car and drive it around. Create a rocket and fly it to the moon.

You can play Garry’s Mod with your friends online, allowing you to cooperatively build together.

Garry’s Mod benefits from a rich productive community – so there’s always new addons to try.