Sleeve M; Vinyl M. Operation: Doomsday is the debut solo LP of MF DOOM, arriving on April 20, 1999 and signalling his transformation into a masked supervillain persona. With self-produced beats blending soulful jazz, ’60s funk, and cartoon skits—each comic-book flourish contributes to a vivid comic‑noir universe. This lo-fi, underground classic became a defining moment in independent hip-hop, launching MF DOOM’s prolific career and solidifying his legacy as the avant-garde “rapper’s rapper”—influencing artists from Madlib to Tyler, the Creator