Operation: Doomsday is the debut studio album by rapper MF DOOM, released through Fondle ‘Em Records on 19 October 1999[3][4][5][6] and reissued by Sub Verse Records in 2001 with a slightly altered track listing.[7] It was his first solo release under the MF DOOM moniker after previously performing as Zev Love X in the group KMD. Operation: Doomsday is regarded as one of the most influential albums in independent hip-hop history.[8] A deluxe remastered version of the album was released by Doom’s own Metal Face Records on 24 October 2011.[9][10]