Assault of the Final Rival (1978)

When his daughter is murdered, William Duncan takes the law into his own hands, setting out on a quest for retribution. After killing the street thug responsible for her death, he finds himself in the middle of a war with the thug's brother, father, and their gang, who are equally hell-bent on getting even. What ensues is a tense back-and-forth game of vengeance. By the end, William comes to find that the quest for revenge never has a winner.

Nick and Ruben are hoodwinked into a "shootfighter" (no-holds-barred, to the death) martial arts match by the evil Mr. Lee, who has a grudge against world shootfighter champ(and teacher of Nick and Ruben) Shingo.

A mentally ill man in a small Texas town goes on a killing rampage and is fatally wounded by police. When doctors use an experimental serum to bring him back to life, the killer develops superhuman strength and the town sheriff must pursue him.

Kai—an outcast—joins Oishi, the leader of 47 outcast samurai. Together they seek vengeance upon the treacherous overlord who killed their master and banished their kind. To restore honour to their homeland, the warriors embark upon a quest that challenges them with a series of trials that would destroy ordinary warriors.

While working as an EMT back stateside Jake Carter after responding to a distress call, finds himself caught up protecting a person of interest from a biker gang ruthlessly hunting them down.

A reformed sociopath heads to a remote island after the death of his brother. Soon after his arrival, the island falls under siege from a deadly gang of mercenaries, and when he discovers their role in his brother’s demise, he sets out on a relentless quest for vengeance.

An aerobics instructor becomes a ruthless assassin after being possessed by a slain ninja's spirit, leading to a showdown with a martial arts expert.

A Philadelphia gang member becomes a drug kingpin and starts a feud with vicious rivals in his quest for the American Dream.

Jeff, a young delinquent, is enrolled by his father in a kenpo school, in the hopes of teaching the boy some self-discipline. Years later, Jeff's mentor, Kim, is being threatened by one of the Korean mafia families. Jeff tries to help his old friend, but is too late to prevent Kim's death at the hands of an unknown hitman. Vowing revenge, Jeff takes on all of the families, using his martial arts skills to find the man who killed his friend.

Former special forces operative Danny is forced back onto a remote island when a violent, secretive community takes revenge by abducting his daughter Alex, launching a relentless hunt against enemies prepared for his every move.