Hey guys. Not sure if this is a scripting thing or not, but I was wondering if there was a way to have a one time code use generator. I ask because I was thinking of putting my game on kickstarter or something where if they donated a certain amount, they would get a key that allows access to lets say, an extra dungeon or special items or something. But after they enter the key, it won't work for anyone else so they can't get the key, use it, and pass it to someone else. Does anyone know of a way to do that?