Garry's Mod

Garry's Mod is a sandbox physics game built on the Source engine that gives players complete freedom to create, experiment, and build using props, tools, and Lua scripting. Rather than providing a traditional objective, the game encourages players to invent their own gameplay through contraptions, roleplay worlds, custom gamemodes, scripted addons, and machinima. Its vibrant modding ecosystem and massive Steam Workshop library have made it one of the most enduring sandbox platforms for creative experimentation and community driven content.