Here is a brief history, from the press release.
“DOOM is one of the most original and uncompromising voices in hip-hop. From his work in the 90’s with the seminal KMD to his legendary releases under a variety of aliases including MF Doom, Madvillain, King Geedorah, Viktor Vaughn, Dangerdoom & more, his prolific body of work has always valued artistic integrity and creativity over anything else. As numerous and varied as his albums are, DOOM also has a thick catalog of guest appearances, remixes, non-album tracks, & vinyl only singles. For the first time, Unexpected Guest presents many of these hard to find tracks as a mix CD, executed and overseen by the Super Villain himself.
With a list of co-conspirators which includes marquee level names such as Talib Kweli, Ghostface & GZA as well as underground heroes Vast Aire, CountBass D & Kurius, the music on this disc highlights DOOM’s ever-present trademark wit and taste for raw and ominous beats. On “Trap Door,” he spits couplets like “No curse words / DOOM the worst church nerd verse heard” over a plucked bass and guitar line from producer Jake One that sounds like the funkiest spy movie soundtrack imaginable. “Sniper Elite” sees the emcee united with the late J Dilla, and is one of the many tracks featured that has yet to see an official CD release. The album will also feature a never before heard live version of DOOM’s classic “I Hear Voices” from the Operation Doomsday album.
Peppered with his signature comic book dialogue and vintage sound clips, Unexpected Guests presents a treasure trove of DOOM obscurities which should shed light on material that even some hardcore fans may have missed. It’s a frenetic, virtuosic look at a true hip-hop original.”
1. Get ‘Er Done feat. DOOM – Jake One
2. Fly That Knot feat. DOOM – Talib Kweli
3. Sniper Elite feat. DOOM – Dilla Ghostface DOOM
4. Trap Door feat. DOOM – Jake One
5. Sorcerers feat. DOOM & Invizible Handz – John Robinson
6. Da Supafriendz – Vast Aire
7. Quite Buttery – Count Bass D feat DOOM
8. ? – DOOM featuring Kurious
9. All Outta Ale – DOOM
10. E.N.Y. House – Masta Killa
11. Bells of DOOM – DOOM
12. My Favorite Ladies – DOOM
13. Street Corners (Remix) – Masta Killa, Inspectah Deck & GZA
You can cop the album here