Dungeon synth is a subgenre of dark ambient music that emerged in the late 1980s and early to mid 1990s. The genre takes inspiration from dark atmospheres found in black metal^[2] ^{and applies it to dreamier ambient songs.}[3]^{The style is often compared to video game music, as it is occasionally applied in those settings.}[3]^

https://en.wikipedia.org/wiki/Dungeon_synth