Operation: Doomsday is the debut solo studio album by rapper MF Doom, marking his return to the hip hop scene after the demise of his group KMD. The album was released through Fondle 'Em Records on 19 October 1999. Operation: Doomsday is regarded as one of the most influential albums in independent hip-hop history and has since achieved status as a cult classic.

Tracks:
- Side 1 -
1 The Time We Faced Doom
2 Doomsday
3 Rhymes Like Dimes (Feat. DJ Cucumber Slice)
4 The Finest (Feat. Tommy Gunn)
5 Back in the Days
6 Go with the Flow
7 Tick Tock (Feat. MF Grimm)
8 Red & Gold
9 The Hands of Doom
- Side 2 -
1 Doom, Are You Awake
2 Hey
3 Operation Greenbacks (Feat. Megalon & King Geedoarh)
4 The Mic
5 The Mystery of Doom
6 Dead Bent
7 Gas Drawls
8 Question Mark (Feat. Kurious Jorge)
9 Hero Vs Villain