ANNIHILATOR haben gleich etliche Gastmusiker eingeladen, beim kommenden Album Metal mitzuwirken. Dabei sind unter anderem Alexi Laiho (CHILDREN OF BODOM), DANKO JONES, Michael Amott und Angela Gossow (ARCH ENEMY), Corey Beaulieu (TRIVIUM), William Adler (LAMB OF GOD), Jeff Loomis (NEVERMORE), Jesper Strømblad (IN FLAMES), Steve ´Lips` Kudlow (ANVIL), Anders Bjørler (THE HAUNTED), Mike Mangini (STEVE VAI, EXTREME, ANNIHILATOR) und Jacob Lynam (LYNAM).
Metal soll am 13. April 2007 erscheinen, die Tracklist:
1. Clown Parade – feat. Jeff Loomis (Nevermore)
2. Couple Suicide – feat. Danko Jones (Danko Jones) & Angela Gossow (Arch Enemy)
3. Army Of One – feat. Steve ´Lips` Kudlow (Anvil)
4. Downright Dominate – feat. Alexi Laiho (Children Of Bodom)
5. Smothered – feat. Anders Bjørler (The Haunted)
6. Operation Annihilation – feat. Michael Amott (Arch Enemy)
7. Haunted – feat. Jesper Strømblad (In Flames)
8. Kicked – feat. Corey Beaulieu (Trivium)
9 . Detonation – feat. Jacob Lynam (Lynam)
10. Chasing The High – feat. William Adler (Lamb Of God)