http://www.up1.co.uk/Details/F1189
I recently "acquired" the game since finding out it was somewhat naughty and I'm curious
So here's the deal, the game (adult visual novel) came first on PC, later it was released on PS2 with the naughty scenes taken out (since can't have naughty scenes in console games apparently), there's also a sequel game called Fate/hollow ataraxia and a prequel in the form of a light novel called Fate/Zero.The original game has 3 branching stories; Fate, Unlimited Blade Works and Heaven's Feel. There are two anime, a series and a movie. The series follows the path of Fate where the movie (yet to be licensed it seems) follows the path of Unlimited Blade Works, as does the manga.
It has a pretty interesting plot that involves magic and summon past heroes
