Kingdom Hearts: DOOM

Kingdom Hearts: DOOM is an upcoming fan-made story crossover between the Kingdom Hearts series and the first-person horror-survival shooter series, DOOM, the latter being first released on December 10, 1993, over nine years prior to the release of the first Kingdom Hearts game. The story is set to publish on fanfiction.net around Halloween 2015 with maps set in events that lead up the story being released following the DOOM reboot's launch in 2016. It is also meant to be a fan-made prelude to the events that will occur in Kingdom Hearts III.