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Room 93 is the debut extended play (EP) by American singer and songwriter Halsey. It was released on October 27, 2014 by Astralwerks.[1] The project was re-released digitally on March 9, 2015, including a new version of its main single "Ghost"; this new version was later also included on the singer's debut full-length studio album Badlands (2015).[2] The sound of the EP is rooted on the electropop music genre.[3] A digital remix version of the EP, featuring three remixes for the songs "Hurricane", "Ghost" and "Trouble" was released on March 3, 2015. Along with the remix EP, a "One Mic, One Take" EP was released on the same date.[4][5] The track "Trouble" was featured on the promo for the episode "Best Laid Plans" from the American TV series Once Upon a Time.