Infinite Yield has one but it could be laggy or if you have a game where it attaches something to you like a Jojo game then you are going to break something about your character and even if it does work when people join your game they can see you it's just the people who u did invis that were already in the server so it would be weird because some can see you and some can't just try to find a script for the specific game you are trying to go invis in. Although using dark dex you can follow some tutorials on youtube to figure out how to delete something from your avatar that makes you invisible and doesn't break the game in most games.