"Showdown" is the fourth single and first track from the album In Silico by Australian drum and bass band Pendulum. It has been remixed by several artists, including DJ Clipz (who is also Red Light) and Excision. It is also the first single taken from In Silico not to use the album logo prominently on its cover.

The single was originally released through various online music stores on 5 January 2009. It was not available in any physical format until 9 February, when Warner Music UK released the 12" picture disc of "Showdown". To help promote the single, Pendulum also released a Space Invaders themed video game which offered players a chance of winning an official framed gold disc of In Silico.

"Showdown" was originally written and produced for the album In Silico by Rob Swire. Although primarily influenced by drum and bass, the song contains prominent elements of both early hard rock and techno, and has even been described as "dance metal" by some critics. "Showdown" opens with vocals from Swire, before going into a heavy guitar riff which is the main focus of the track. It also makes extensive use of both sampled and acoustic drums to produce large and heavy sounds respectively.

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