Aniplex has announced the Fate/stay night 15th Celebration Project. Fate/stay night is a visual novel developed by Type-Moon and released for PC on January 30, 2004. It was originally released as an ages 18 and up title, but received an all ages version when it was ported to PlayStation 2 in 2007.
Source: N4G PC Fate/stay night 15th Celebration Project begins