Releasing these new screenshots, Atlus U.S.A. announced that Master of the Monster Lair for Nintendo DS has slipped out of September and is now scheduled for release on October 21. Master of the Monster Lair is an RPG adventure where you must become the architect of a vast labyrinth, crafting levels designed to lure and capture all kinds of beasts. Every monster disposed of offers the promise of new weapons and items, allowing for more unique dungeon designs and more efficient means of killing baddies.