Can you please send me a model (in DMs) containing this serverside?
Hard to believe this statement. There is no possible way to load in a module without getting the environment of require, or using the vanilla function itself. There are possible ways through loadstring, but it’s a guessing game if the creator enabled loadstring to their game, so they use their own byte code interpreter to bypass the loadstring toggle which still requires the require function to operate.
Edit: seems like you cannot find a model containing it. If you cant find a model containing it, how do you know that it is doing the actions you presented? Possibly, the developers of the games they infected have less Lua knowledge so they dont know of such thing. Just because it’s in a popular game doesnt mean its using something which is impossible in the Roblox client.