Nier (stylized as NieR) is an action role-playing video game developed by Cavia and published by Square Enix for the PlayStation 3 and Xbox 360. In Japan, the game was released with two versions:
- NieR Gestalt (Japanese: ニーア ゲシュタルト Hepburn: Nīa Geshutaruto?) for the Xbox 360, with old father figure main character.
- NieR RepliCant (Japanese: ニーア レプリカント Hepburn: Nīa Repurikanto?) was released for PlayStation 3 with a younger main character.