The Gauntlet can now exclusively reveal that Killswitch Engage has been added to the Rockstar Mayhem Festival lineup. The band will be performing on the mainstage with Slayer, Marilyn Manson and Bullet for my Valentine.

Hot Topic Stage
Whitechapel
Black Dahlia Murder
Job For A Cowboy
Behemoth
Cannibal Corpse

Jägermeister Stage
God Forbid
All That Remains
Trivium


Below are the correct dates / venues (other sites are reporting misinformation)

7/10/09 Sacramento, CA Sleep Train Amphitheatre
7/11/09 San Francisco, CA Shoreline Amphitheatre
7/12/09 San Bernardino, CA Glen Helen Pavilion
7/13/09 OFF
7/14/09 Seattle, WA White River Amphitheater
7/15/09 OFF
7/16/09 OFF
7/17/09 Phoenix, AZ Cricket Pavilion
7/18/09 Albuquerque, NM Journal Pavilion
7/19/09 Denver, CO Coors Amphitheater
7/20/09 OFF
7/21/09 Kansas City, KS Sandstone Amphitheater
7/22/09 St. Louis, MO Verizon Wireless Amphitheater
7/23/09 OFF
7/24/09 Atlanta, GA Lakewood Amphitheater
7/25/09 Indianapolis, IN Verizon Wireless Music Centre
7/26/09 Chicago, IL First Midwest Bank Amphitheatre
7/27/09 OFF
7/28/09 Toronto, ON Molson Amphitheater
7/29/09 Scranton, PA Toyota Pavilion
7/30/09 OFF
7/31/09 Cleveland, OH Blossom Music Center
8/1/09 Pittsburgh, PA Post Gazette Pavilion
8/2/09 Detroit, MI DTE Energy Music Theatre
8/3/09 OFF
8/4/09 Boston, MA Tweeter Center for the Perf. Arts
8/5/09 OFF
8/6/09 Virginia Beach, VA Virginia Beach Amphitheater
8/7/09 Camden, NJ Tweeter Center at the Waterfront
8/8/09 Hartford, CT New England Dodge Music Center
8/9/09 Washington, DC Nissan Pavilion
8/10/09 OFF
8/11/09 Tampa, FL Ford Amphitheatre
8/12/09 West Palm Beach, FL Sound Advice Amphitheater
8/13/09 OFF
8/14/09 Dallas, TX Superpages.com Center
8/15/09 Houston, TX
8/16/09 San Antonio, TX Verizon Wireless Amphitheatre