Universal Horror Unleashed is an upcoming 110,000-square-foot (2.5-acre) Halloween-themed attraction under construction at Area15, an entertainment complex located in Las Vegas, Nevada, and in development at Universal Studios Great Britain. Announced in January 2023, it is the second Halloween-themed experience from Universal Destinations & Experiences, after Halloween Horror Nights. The attraction is set to open in 2025, at Area15.

AREA15 is an experiential retail and entertainment complex located in Las Vegas, Nevada, one mile west of the Las Vegas Strip. It houses several major experiential entertainment residencies and includes sculptures and other art displays, as well as alcohol outlets and a restaurant.