I need help hiding a script using modules or scripts?!

The first answer is half true half false. By putting scripts in server script service, they are not accessible from the client-side. This means that any exploit will render useless in an effort to get them. However if a player can hack(very rare), they still theoretically could gain access to your scripts. The best thing to do is to put mini checks in them. These would look like this. I suggest you insert them into the middle or bottom of the script to make them harder to find/remove.

if game.PlaceID ~= *Your place ID here* then
	for _,v in pairs(game.Players:GetPlayers()) do
		v:Kick("Dont steal games, it violates TOS.  -_-")
	end
end

Roblox has sadly removed the ability to make a script completely private because any module is public through the website even though they won't be able to get it in-game. I hope I was able to help out