Also known as: Gekijouban Steins;Gate, Steins Gate Movie
A film adaptation of Steins;Gate was announced at the end of the 2011 TV anime series that was created by studio White Fox, based on the non-ero visual novel Steins;Gate, originally developed by the Japanese studios 5pb. and Nitroplus and released in 2009, as a "hypothetical science adventure" game. The story takes place in Tokyo's Akihabara district, one year after the events of Chaos;Head - the game's prequel of sorts from 2008, which has also received an anime version.
Producers, official website and other details: AniDB