Your dungeon data file should reside in <code>Script/dungeons</code> where it will automatically be picked up by the game when it creates the world map. It should contain the kinds of things described in the article on [[Dungeon Building]]. Most importantly, the [[#Dungeon Building:DungeonControlVariable|<code>Dungeon</code>]] control variable will need to be the <code>DEFINED_VALUE</code> you set in <code>define.dat</code>, which will help link the dungeon to its overworld terrain.