Garry's Mod, but in Roblox

Roblox has it's own Garry's Mod game called "Ray's Mod", it's remake of Gmod, but using Roblox engine instead of Source. It's insane, but also hilarious...
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Roblox Gmod sandbox game is very funny with friends, but there's a lot of griefing and lag, so private roblox server can help a lot. You have to spend Robux to get roblox addons, but it's very cheap and you still get access to sandbox, prophunt, zombies and events for free.