Rengoku: The Tower of Purgatory is an action RPG for the PlayStation Portable (PSP) that was released in 2005. The game is set within a dystopian future where players navigate through the levels of a massive tower. Each level represents one of the seven deadly sins, and players must defeat enemies and bosses to ascend. With a unique cyberpunk aesthetic and customizable androids, the game blends intense combat with strategy. Players can upgrade their android with weapons and abilities looted from defeated foes.