More acts have been added to the various Riot Fests. Bands added to the Denver Riot Fest include: System Of A Down, The Prodigy, Death Grips, 88 Fingers Louie, Chef’Special, and Input + Broken. Bands added to the Chicago Riot Fest include: System Of A Down, The Prodigy, Death Grips, 88 Fingers Louie, and Chef’Special.…