[1] It is the prequel to Gargoyle's Quest (part of the Ghosts 'n Goblins franchise) and features a similar gameplay style, which combines adventure elements with side-scrolling action in a macabre fantasy setting.

[2] The Demon Darkness utilizes a password system and is broken into two sections: Traversing the Ghoul Realm via an overhead map view, and side-scrolling action areas, that take place in dungeons, across giant pits, and more.

One day, while Firebrand was out partaking in his daily routine of training in a small, alternate dimension, The Black Light appeared unexpectedly and destroyed his home.

[7] Tim Latshaw of Nintendo Life called Gargoyle's Quest II: The Demon Darkness "a fine little gem from back in the day that deserves all the appreciation of players who are up to its tough but not impossible style of gameplay."

He deeply welcomed the virtual console's "restore point" save function as an addition to the archaic password system, going as far as to imply either of these ports were the superior ways to play the NES version of the game.