The Hidden (Usa) is a Nintendo 3DS game developed by Arc System Works and published by Aksys Games. The game is a side-scrolling action-adventure game set in a post-apocalyptic world. Players take on the role of a protagonist named Usa, who is a survivor of a mysterious virus that has wiped out most of humanity. Usa must explore the world, battle enemies, and uncover the secrets of the virus in order to save humanity. The game features a unique art style, with colorful characters and environments. The game also features a unique weapon system, allowing players to use different weapons in order to defeat enemies. In Japan, the game is known as The Hidden: Ushinawareta Yami no Monogatari.