What is "speedrunners"

n. (plural of speedrunner English)

SpeedRunners is a multiplayer side-scrolling racing game developed by DoubleDutch Games and published by tinyBuild Games. Originally a free web browser game titled SpeedRunner and later an Xbox 360 game by the name SpeedRunner HD on Xbox Live Arcade, SpeedRunners was released on Steam on 26 August 2013 into Steam Early Access, and officially on 19 April 2016. It was recognised as an eSport by the Electronic Sports League in July 2015.