Slipknot and Slayer have been announced as the headliners for the 2012 Rockstar Mayhem Festival. Check out the full lineup and other details for the 25-date traveling festival here.

Slipknot and Slayer -- two of the most respected bands in metal -- have been announced as the main acts for this year's Rockstar Mayhem Festival. The lineup also boasts a respectably kick ass side stage roster including Anthrax, The Devil Wears Prada, Asking Alexandria, As I Lay Dying, and Whitechapel. The announcement also says that there will be another special guest announced on March 5th, which some reports (and the promo posted at the bottom of the page) have identified as hard rock vets Motorhead.

2012 Mayhem Festival Tour Dates

06/30 – San Bernardino, CA
07/01 – San Francisco, CA
07/03 – Seattle, WA
07/06 – Phoenix, AZ
07/07 – Albuquerque, NM
07/08 – Denver, CO
07/10 – Dallas, TX
07/11 – Houston, TX
07/13 – Tampa, FL
07/14 – Atlanta, GA
07/15 – Indianapolis, IN
07/18 – Oklahoma City, OK
07/20 – St. Louis, MO
07/21 – Chicago, IL
07/22 – Detroit, MI
07/24 – Cincinnati, OH
07/25 – Cleveland, OH
07/27 – Philadelphia, PA
07/28 – Pittsburgh, PA
07/29 – Washington, DC
07/31 – Saratoga, NY
08/01 – Buffalo, NY
08/03 – Boston, MA
08/04 – Scranton, PA
08/05 – Hartford, CT