Where can you find the Garry's Mod sandbox game?

The best place to get Garry's Mod is on the Steam platform, which is owned by Valve, the creator of the game engine that Garry's Mod uses. Garry's Mod is a digital modification for Valve software's source engine video games, such as Half Life 2, Portal 2 and Counter Strike.

Garry's Mod is a sandbox modification of Valve's Source engine and can easily be acquired on Valve's digital gaming platform, Steam. To acquire Steam and Garry's Mod, simply go to the homepage of Garry's Mod and from there you are directed to the steam store page, where you can purchase Garry's Mod and download Steam.