HKFC: School of Hard Knocks 12 (2011)

Russian inmate Boyka, now severely hobbled by the knee injury suffered at the end of Undisputed 2. No longer the feared prison fighter he was, he has declined so far that he is now good only for cleaning toilets. But when a new prison fight tournament begins - an international affair, matching the best fighters from prisons around the globe, enticing them with the promise of freedom for the winner - Boyka must reclaim his dignity and fight for his position in the tournament.

Picking up after the events of Never Back Down 2, former MMA champion Case Walker is on the comeback trail to become champion once again.

Two warring gang families (one African-American, the other Chinese) maneuver for bragging rights to the Oakland, California, docks. Hang Sing and Trish O'Day uncover a trail of deceit that leaves most of the warring factions dead … or worse!

After a blood- soaked jujitsu match in Dubai, fighting legend Mickey Kelley falls to superstar Blaine. But years later, an online video proves that Blaine cheated, and the world demands a rematch. Can the aging underdog get back into shape in time to vanquish his foe, get revenge, and claim his prize?

Jake, full of anger after his father's death, is just starting to find a place for himself at his new Orlando high school - until Ryan, head of an underground MMA fight club, picks Jake out as a prime opponent. After being trounced by Ryan in front of the entire school, Jake begins training under the firm, moral guidance of a MMA master, where he learns how to fight... and how to avoid a fight. But it becomes obvious that a rematch will be inevitable if Jake wants to stop Ryan and his bullying, once and for all.

Four fighters from different backgrounds come together to train under an ex MMA rising star and then ultimately have to fight each other and the traitor in their midst.

A martial artist agrees to spy on a reclusive crime lord using his invitation to a tournament there as cover.

The mob is trying to strongarm local martial arts schools, forcing young Jason Stillwell and his family to move after his father is injured defending their dojo. With his father now rejecting violence, Jason is forced to train on his own to protect himself and his best friend from the members of a rival karate school.

Small-town boy Shawn MacArthur has come to New York City with nothing. Barely earning a living selling counterfeit goods on the streets, his luck changes when scam artist Harvey Boarden sees that he has a natural talent for streetfighting. When Harvey offers Shawn help at making the real cash, the two form an uneasy partnership.

When Karate champion Michael Rivers wins the last tournament of his career, shady businessman Ron Hall offers him the opportunity to fight in an illegal Kumite in Bulgaria against the world’s best martial artists. When Michael declines, Hall has his daughter kidnapped and, in order to rescue her, Rivers is left with no choice but to compete in the deadly tournament. Arriving in Bulgaria, he finds out that he is not the only fighter whose loved one was taken. Rivers enlists the help of trainers Master Loren, and Julie Jackson but will it be enough for him to win the tournament and save his daughter’s life?