Fullmetal Alchemist: Blood Moon (鋼の錬金術師:血月, Hagane no Renkinjutsushi: Chitsuki; literally, "Alchemist of Steel: Blood Moon") is Fullmetal Alchemist fanon wiki's installation of the Fullmetal Alchemist series. It takes place in the modern year of 2010, ninety-five years after the events of the canon Fullmetal series. It's main writers are User:Ten Tailed Fox and User:Silver-Haired Seireitou.

The world has all but forgotten the terrifying events that took place in the nation of Amestris ninety-five years ago, when the Homunculus named Father almost destroyed the entire nation as he did to ancient Xerxes. Only two decades earlier, the Fullmetal Alchemist himself, Edward Elric, died at the old age of 91 and soon after so did his brother, Alphonse Elric. The two had become revered as the most powerful alchemists to have ever lived. Alphonse brought his knowledge of alchemy and alkahestry to the nation of Arcadia in 1926, years before his death, leading to the rise of a second alchemy-using nation.

The world is now on the brink of a World War. Non-alchemy nations believe that alchemy-using nations are using their alchemists' supernatural powers to oppress regular nations and peoples. On top of this, a failed experiment ninety-five years old has caused the rise of a Homunculus named Instinct who plans to dominate the world's nations, further pushing war on the nations. Out of this time of turmoil comes new alchemists, with their own goals and dreams...little do they know that their destinies are entwined. Their job; to stop the upcoming war from destroying humanity and to stop the plot set in motion by Instinct and other evil figures around the world.

Among them is Sōsuke Yao, the descendant of the Elric's and a powerful alchemist of Amestris, Ryan Blackwood and Matthew Fenn, both from Arcadia, are cousins and strong alchemists from their nation. One wishes to become a State Alchemist of Arcadia, the other simply wishes to protect his family and friends with his alchemy.