Never Back Down: Revolt is a 2021 American martial arts film directed by Kellie Madison and written by Audrey Arkins. It is a standalone sequel to Never Back Down: No Surrender (2016), and the fourth installment overall in the Never Back Down film series. Unlike the other films in the series that focus on mainstream Mixed Martial Arts fighting, Revolt has a much darker tone, focusing on an underground fighting ring made up of kidnapped women, who band together to fight back against their captors and escape to freedom. The movie was released digitally and on DVD on November 16, 2021.