Neon Genesis Evangelion: Girlfriend of Steel , also known as Neon Genesis Evangelion: Iron Maiden, 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. While it does feature much of the cast of the original game, the story is unrelated to the original's.

Neon Genesis Evangelion is a Japanese media franchise created by Hideaki Anno and owned by Khara. Most of the franchise features an apocalyptic mecha action story, which revolves around the paramilitary organization NERV and their efforts in fighting hostile beings called Angels, using giant humanoids called Evangelions that are piloted by select teenagers. Subsequent works deviate from this theme to varying degrees, focusing more on romantic interactions between the characters, plotlines not present in the original works, and reimaginings of the conflicts from the original works.