Underground BGM - Super Mario Bros.
Underground BGM was originally composed by Koji Kondo for the Underworld music in Super Mario Bros. (NES). Due to the popularity of the franchise, the music has been rearranged and remixed for many different games.
The title comes from the Famicom 20th Anniversary Original Sound Tracks Vol.1 album; BGM stands for "background music".
Listeners have compared the song with the Let's Not Talk About It by Friendship.
Super Mario Bros. (NES)
This tune is played in all all of the underground levels of Super Mario Bros. including 1-2, 4-2, and all underworld coin sections. The song has become rather iconic in video game culture. When time is running out, you'll hear the "Hurry Up" version of the tune which plays at double time.
Super Mario Bros. 3 (NES)
Underground BGM was remixed for the underworld music of Super Mario Bros. 3 (NES). The remix plays at a faster tempo and features a hip-hop drum beat.
Mario Party (N64)
The Pipe Maze game uses a rearrangement of Underworld BGM.