Blender collision activation only once I have it so that once you touch this block, my voice actress begins giving a tutorial, but if you touch it again, she starts all over again, do you know a way to make this happen only once?
Add a boolean property which is False by default. On collision, set it to True and play the sound only on collision AND if the property is equal to False.
Change the state on collision. States behave like layers, only the current active state(s) get executed. For a detailed explanation see: https://docs.blender.org/manual/en/dev/game_engine/logic/states.html