* Based on the Japanese Dungeon Role Playing Game created by Type-Moon, which was originally released exclusively for the PlayStation Portable (PSP).

It was the forgotten EXTRA.

This is a story of EXTRA that will unfold on a forgotten moon. The Mooncell Automaton, a spiritron computer that exists on the moon, grants any and all wishes. A virtual spiritron world created within the Mooncell is SE.RA.PH. With the "Holy Grail" on the line, Wizards and Servants must now wage a brand new Holy Grail War of the Moon.

Source: Official website

AniDB | ANN (2) | MAL (2) | TVDB | Wiki (en)

Alternative setting: Fate/Stay Night