Hydlide is an action role-playing game developed by T&E Soft and first released in Japan in 1984 for the PC-8801 home computer, later reaching other systems including the Nintendo Entertainment System. It was one of the early action RPGs, and its simple, repetitive chiptune music has become part of its reputation among retro gaming fans. Shared in retro game videos, compilations, and memes, the theme is now recognised online as a shorthand for 1980s gaming, still used because its bright, dated sound instantly evokes that era.