Ariadne 3D Dungeon Maker is a powerful asset to create 3D dungeons.
In the extension, you can make grid-based map data in MapEditor.
And set it to the Game Controller prefab, Ariadne 3D Dungeon Maker produces dungeons according to your map data at runtime.
This asset includes the MoveController that enables movement in the dungeon.
The controller enables processing events, too.