This song is my cover of 'The Docks' from an old DOS game 'Heretic: Shadow of the Serpent Riders' originally composed by Kevin Schilder. It is not an exact copy of the original, as instead I wanted to mix the song and especially extend it because the original was only about two minutes long.
As the original song was MIDI (actually MUS but close enough) there are a couple of different sounding versions of the song. You can listen to one version of the original song here: The Docks on YouTube
You can also get a high definition version of the cover art here.