Harmonix and MTV Games have announced three Slipknot songs to be available for download in the Rock Band Music Store starting next week.

Available as a three-pack or individually, the original master recordings of “Duality”, as well as “Psychosocial” and “Sulfur” will join the ranks of Rock Band’s 1000+ song catalogue.

For Xbox 360 and Wii, the masked Iowa metal contingent’s tracks will be available on December 8th and for PlayStation3 on December 10th. Prices may vary by country and video game system.