Fate/zero - the anime's on Netflix and Hulu, in addition to CrunchyRoll. The original visual novel, Fate/stay night, has some LPs out there but reading it can be a chore. (It is also an eroge, which means truly laughable porn.) There's two awful Studio DEEN animes the entire fandom pretends isn't there, but luckily the animation studio that did Fate/zero is releasing a new anime for /Stay night this fall.