Pokemon Nightmare Version: Invasion is a survival-horror fan game by Xargoth.
On the 11th of January, 1996, the citizens of Azure City seemed to have disappeared under mysterious circumstances. On the 25th, a team of policemen are sent to investigate but, unable to find their colleagues, only 4 return after a failed investigation. One month later, a young investigator named Jack heads to the city to solve the case once in for all.
The game includes more terrifying versions of canonical Pokemon that act as enemies throughout the game.