Ofc there is one, at least the ways GMs use to be invisible. But if anybody here knows is is another question. I dont think so. Invisibility is a much more complicated hack than bypass GG or vac/wallhack. You have to be very leet hacker to make this. Who knows, maybe u have to have some GM scrips or whatever. At least we know its possible to make a char invisible (GMs use this), but i doubt anybody can tell you how, or is willing to tell you if he knows the way. Imagine it would be public, and you would have even more hackers then now, but you wont see any. The only ppl you would see were legits. And the only mobs you would see would be chasing some invisible hacker. This would be the worst public hack i think.