Garry's Mod is a sandbox physics game that gives you the tools to build, experiment, and play your way. Spawn props and ragdolls, weld, rope, and hinge them together, and create contraptions that obey Source engine physics. Dive into countless community-made modes from Prop Hunt and Trouble in Terrorist Town to DarkRP, or invent your own experiences with Lua scripting. With Steam Workshop support, thousands of addons, maps, and tools keep the game endlessly replayable solo or online with friends.
Launch Sandbox and learn the Physics Gun to grab, rotate, and precisely place objects. Use the Tool Gun to weld, rope, and add constraints, then spawn props from the spawn menu to build contraptions. Browse and install addons and game modes through Steam Workshop, then enable them in-game for new content. Join public servers or host your own to play modes like Prop Hunt, Trouble in Terrorist Town, DarkRP, or pure Sandbox with friends. Save your builds as dupes or scenes and share them with the community so others can load and remix them. Experiment with Lua-based tools and scripts to customize controls, automate behaviors, or create your own game mode.