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

November 2025 Update

New water visuals, NPC improvements, and more!

New game assets, and many, many other improvements.

Stability/security patch

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.