a sample in Other

a sample in Rock

"Its not quite that, but thank you for trying. I agree, it is very simlar to what I rember tho. "

a sample in Soundtracks

a sample in Country

"The arranger of the cassette (남상규 = Nam Sang Kyu) is likely the artist of this track (he is credited as the producer in the youtube link below). However, Nightmare II (the game) is a different story. It's either a very very obscure Korean video game made either in 1991 or before 1991, or a Korean port of some other popular American/Japanese game. Either way, the game itself may very well be lost media. 
I tried to search the Korean name of the game (나이트메어 II) on Korean browser Naver, but I got Little Nightmares II, which was made in 2022, so that isn't the game we're looking for. The amount of old games that showed up in Naver, however, were not as many, but still enough. I found titles like Diablo and Megaman. This leads me to believe that Nightmare II is probably a Korean port of a game made overseas, but we're never sure until we confirm it. 
Submission to VGMDB (where I got the information that the game was made in 1991 or before 1991): https://vgmdb.net/album/12031
Hear the Music: https://www.101soundboards.com/boards/640323-gameworld-1st-anniversary-commemoration-8-1-video-game-music
https://www.youtube.com/watch?v=8Os6Ggma1Xs

Just if anyone wants to hear (I think) the full cassette.
"

a sample in Other

"Hi! I've found an ost soundtrack from this adobe flash game that sounds very similar to the sample, but the game uses catapults instead of cannons, so I may be wrong on this"

"Up!"

Crush the Castle 2 - Title Theme and Map Music