Sega (Sega Saturn) Neon Genesis Evangelion: Girlfriend of Steel (新世紀エヴァンゲリオン鋼鉄のガールフレンド, Shinseiki Evangerion: Kōtetsu no Gārufurendo), also known as Neon Genesis Evangelion: Iron Maiden,[1] is a video game based on the Gainax anime/manga series Neon Genesis Evangelion, released officially only in Japan for the PlayStation, Sega Saturn, PlayStation 2, PSP, Windows (PC), and Macintosh.

On January 20, 2005, a legacy game titled Neon Genesis Evangelion: Girlfriend of Steel 2nd was released for the PlayStation 2.

In April 2006, a special edition was released for the PS2 and the PC as part of Evangelion's ten-year anniversary, with additional scenes focusing on the TRIDENT pilots' lives.

Fourteen-year-old Mana Kirishima (voiced by Megumi Hayashibara) is transferred to Shinji Ikari's school, and almost immediately they begin to establish a special relationship.

Rei Ayanami is present but plays a rather background role in the story, though she seems to agree with the suspicions of Asuka.

However, the one true branch occurs at the end of the game, where the player may choose to focus on Mana, Asuka or Kaji.