Ghosts 'n Goblins is a port of the 1985 arcade game  by Capcom, which has become famous for its punishing difficulty. Its legacy is strong: it was included on the NES Classic and just got a reboot in the form of Ghosts 'n Goblins Resurrection . Ghosts 'n Goblins is an insanely difficult platformer. You control Arthur, a knight who must rescue Princess Prin Prin (short for Princess Princess Princess, one assumes). An opening cut scene (happily retained on the NES!) shows Satan himself kidnapping her. Interestingly, Satan is not the final boss, which is instead the demon Astaroth. Astaroth most notably appeared in the 16th-century play Doctor Faustus by Christopher Marlowe. It also appeared as a major boss in Final Fantasy II  on the Famicom. This game is very demon-based — indeed, its Japanese title means "Demon World Village" (see this 2005 interview with the developer). Given that it also has enemies spattering blood, it's a wonder Nintendo of America licens

The 1984 arcade game Super Xevious received a Famicom-exclusive spin-off of the same name but with the sub-title "Ganpu no Nazo," which translates to "The Mystery of GAMP." GAMP is an acronym for General Artificial Matrix Producer, the final boss of Xevious and Super Xevious. GAMP's "mystery" (or puzzle) refers to how each level requires the completion of a hidden objective to proceed. The level keeps looping until you do it. The first level, for example, requires you to fly your ship (the Solvalou) into a random cloud. The second level requires you to rescue another ship (called Phantom). None of the objectives are off-the-wall, and several are just destroying all the ground targets. As in Xevious, you shoot your gun with B and lob bombs at ground targets with A. The actual shooting part of the game is not too difficult. The enemies never overwhelm you, and there are rarely too many bullets to dodge. That's not to say that the game is easy . I hav