Monster Energy Aftershock Festival has joined forces with Slipknot's Scream Park for the Monster Energy Aftershock Pre-Party on Friday, October 23 from 7 p.m. to midnight in Sacramento, California. HELL OR HIGHWATER will headline the Pre-Party (with more bands to be announced) and has also been added to the Saturday, October 24 lineup of the Monster Energy Aftershock Festival at Gibson Ranch just outside Sacramento. SLIPKNOT's Corey Taylor and M. Shawn "Clown" Crahan have partnered with Sacramento-based Scream Park California to produce an event that explores a whole new, intensely visceral world of horror, as only SLIPKNOT can provide. Slipknot's Scream Park features three haunted houses and thunderous live horror entertainment. Slipknot's Scream Park will also have an onsite presence at Monster Energy Aftershock on October 24 and 25. A limited number of guests can gain admission to the Monster Energy Aftershock Pre-Party by showing proof of purchase of an Aftershock ticket. This will allow free access to the Aftershock Pre-Party, which will include live music and food trucks. That night, guests will be able to go through the haunted houses at Slipknot's Scream Park for a discounted price of $15. More details will be available soon about music performances at the Pre-Party and how to obtain free Pre-Party admission, as space will be limited. The fourth annual Monster Energy Aftershock will feature a spectacular music lineup of hard rock, alternative and metal artists, as well as an expanded festival site with onsite camping Saturday, October 24 and Sunday, October 25. The band lineup for Monster Energy Aftershock 2015 includes SLIPKNOT, FAITH NO MORE, DEFTONES, SHINEDOWN, JANE'S ADDICTION, MARILYN MANSON, COHEED & CAMBRIA, STONE TEMPLE PILOTS, BREAKING BENJAMIN, SEETHER, BRING ME THE HORIZON, ALL TIME LOW, SLEEPING WITH SIRENS, EAGLES OF DEATH METAL, BLACK VEIL BRIDES, and many more performing on four stages. In addition, the festival will feature live, in-ring matches with WWE's NXT Superstars. Visit www.aftershockconcert.com to view the daily band lineup, and purchase VIP and GA tickets, as well as camping and hotel packages. Slipknot's Scream Park is also offering an Aftershock Scream Park Bundle for $119.50. This package includes one 2-day General Admission weekend ticket to Monster Energy Aftershock and one Scream Park General Admission ticket (a $25 savings). Purchase your combo tickets for both Slipknot's Scream Park and Monster Energy Aftershock Festival at link text or www.slipknotscreampark.com. Slipknot’s Scream Park is located at 4909 Auburn Blvd. in Sacramento, California.