For those not familiar with the terminology, games in the "Sub-genre That Shall Not Be Named" are a turn-based Diablo-style dungeon-crawling RPG. Dungeons, items and monsters are usually randomly generated and find the player guiding characters through levels one move at a time. Each time your character performs an action, all enemies in the area do the same. The style of play has already made it to the US, such as Poke'mon Mystery Dungeon and Izuna: Legend of the Unemployed Ninja, though typically challenging difficulty has kept the genre from growing outside a small, dedicated group of players.