ナンバーズ2 アントールド：ファブニール騎士 (USA) (Etrian Odyssey 2 Untold - The Fafnir Knight (USA)) is a dungeon crawler role-playing game developed by Atlus and published by Nintendo for the Nintendo 3DS. It is the fifth installment in the Etrian Odyssey series and a remake of Etrian Odyssey II: Heroes of Lagaard. The game features a story mode, which follows the adventures of a group of adventurers as they explore the Yggdrasil Labyrinth and discover its secrets. The game also features a classic mode, which allows players to customize their own party and explore the Yggdrasil Labyrinth as they wish. The game features an enhanced battle system, with a new class system that allows players to customize their characters more than ever before. The game also features a variety of new dungeons and monsters, as well as new mechanics such as the 'Fafnir' system, which allows players to transfer their characters' abilities to other characters. The game also features a variety of new music and visuals, as well as a new character creation system. Etrian Odyssey 2 Untold - The Fafnir Knight (USA) is a challenging and rewarding dungeon crawler that offers hours of entertainment for players of all levels. With its enhanced battle system, variety of new dungeons, and plethora of new mechanics, the game is sure to provide an enjoyable experience for both newcomers and veterans of the series.