The U.S. edition of Slipknot's Knotfest 2014 was already pretty awesome as is, but a wealth of new bands are also getting in on the fun as well. Fear Factory, Napalm Death, Otep, Amen and more have signed on to take part in the late October festival, which will be staged at the San Manuel Amphitheatre in San Bernardino, Calif.

Fear Factory, Napalm Death, Satyricon, Otep, Prong, Amen, Immolation, Attika 7, Exmortus and Rattlehead are the new additions to the bill. Organizers have also revealed plans for an Extreme Stage as well.

The fun begins Friday, Oct. 24 with a VIP and Camping Kickoff Party featuring Suicide Silence, The Black Dahlia Murder, Butcher Babies, Chelsea Grin and Alterbeast.

On Saturday (Oct. 25), fans can look for Slipknot headlining the main stage with support from Danzig, Anthrax, Black Label Society and Hatebreed. One of the side stages will feature Testament, Carcass, Maximum the Hormone, King 810 and Man With a Mission. There will also be a side stage with In This Moment, The Devil Wears Prada, Butcher Babies, Miss May I and One OK Rock. Meanwhile, the Extreme Stage will feature Satyricon, Otep, Prong, Amen and Immolation.

Slipknot are back to headline the Sunday (Oct. 26) festivities with Five Finger Death Punch, Volbeat, Tech N9ne, Atreyu and Hellyeah joining them on the main stage.

Of Mice & Men will headline Stage 2 on Sunday with DevilDriver, Veil of Maya and Nothing More playing alongside them. Killswitch Engage head up Stage 3, with support from Whitechapel, Upon a Burning Body and Anti Mortem. And the Extreme Stage features Fear Factory, Napalm Death, Attika 7, Exmortus and Rattlehead.

For two-day and single-day tickets, be sure to visit the Knotfest 2014 website.

See What Slipknot's Members Look Like Without Their Masks