"Nier" is an action role-playing game developed by Cavia and published by Square Enix. Released in 2010, it is set in a post-apocalyptic world where players control Nier, a father on a quest to save his daughter, Yonah, from a mysterious illness. The game features a blend of combat, exploration, and storytelling, with multiple endings based on player choices. The game is known for its unique narrative and emotional depth, exploring themes of sacrifice, identity, and the nature of humanity. It has spawned a sequel, Nier: Automata, which further expands the universe and has received critical acclaim for its gameplay and story.