Listen to Showdown (Underscore) online. Showdown (Underscore) is an English language song and is sung by Pacifica Music. Showdown (Underscore), from the album Promo & Trailer Toolbox: SCI-FI & Fantasy, Vol. 3, was released in the year 2017. The duration of the song is 2:19. Download English songs online from JioSaavn.