Holy shit this is fucking late but FGO's setting is almost exactly similar to Danganronpa.

-Fujimaru being chosen by pure luck as a master candidate and surviving because of that, being the ultimate luck master.They're also the literal Ultimate Hope of the world, universe even.
-the world is completely fucked
-One of the character you think will be the main girl of the story dying almost immediately and being replaced by a mysterious purple hair girl instead
-a constant holy war between those of their friends(servants) in extremely convoluted settings with various mysterious as to why everything is fucked up
-A cute yet monstrous multi-color beast that is the killer of all man
-A FUCK TON OF DEAD PEOPLE DYING IN TERRIBLE WAYS

I can't believe it. Fate Grand Order even has the same syllables as Danganronpa. WHHHOOOAAA!!