Explore Percent
When the world is generated it is made up of rooms that are in turn made up of screens. The number of screens worth of map that exist can vary wildly depending on the settings used to generate the world. The explore percent represents how many screens of the map have been visited by the player out of how many existed in the world.
ExplorePercent = ScreensVisited / ScreensInTheMap * 100
This information is part of the Verify Code.