Garry's Mod is a great open-world sandbox game where you can do what you want- and you can download things like: ragdolls, NPCs, maps, weapons, and mods- off of the Steam Workshop- for FREE!! Before I owned the game, I would watch YouTube videos about different stuff you can do in Garry's Mod, and that's what made me make a Steam account so I could get this game- and I got the new version, which is GM13. Anyway, I would recommend this game to everyone, especially people who like a game where you can do whatever you want.
My rating: 10/10