NXT TakeOver XXX (originally NXT TakeOver: Boston) was the 30th NXT TakeOver professional wrestling livestreaming event produced by WWE. It was held exclusively for wrestlers from the promotion's NXT brand division. The event took place on August 22, 2020, at Full Sail University in Winter Park, Florida as part of that year's SummerSlam weekend. It was also the final NXT TakeOver event to air exclusively on the WWE Network, as beginning with TakeOver 31 in October, the events also became available on traditional pay-per-view.

The event was originally scheduled to take place at the TD Garden in Boston, Massachusetts, but due to the COVID-19 pandemic, the city's Mayor Marty Walsh announced the suspension of all large-scale gatherings and that no permit would be issued for an event that could draw a large crowd before September 7. As such, the event was moved to NXT's home base of Full Sail University. It was the final NXT TakeOver event to be held at Full Sail, as beginning with TakeOver 31 in October, NXT's events were moved to the WWE Performance Center in Orlando, Florida and broadcast from a new setup dubbed the Capitol Wrestling Center.

Six matches were contested at the event, including one on the pre-show. In the main event, Karrion Kross defeated Keith Lee to win the NXT Championship. In the penultimate match, Io Shirai defeated Dakota Kai to retain the NXT Women's Championship. In other prominent matches, Damian Priest won the vacant NXT North American Championship in a ladder match, and Adam Cole defeated Pat McAfee, which was McAfee's WWE in-ring debut.