Dirty Kung Fu (1978)

In the midst of a violent gang war, a series of misfortunes threaten the fate of a gang boss and his mob.

While on a hunting trip in the isolated wilderness, a father and his adopted teenage son are turned into the prey of unknown assailants. They are unexpectedly joined in their fight for survival by a stranger who reveals the disturbing truth about the son's biological father, an international crime lord, and why that crime lord has sent trained assassins to kill the teenager.

A French chef swears revenge after a violent attack on his daughter's family in Macau, during which her husband and her two children are murdered. To help him find the killers, he hires three local hit-men working for the mafia.

Fight everyone and trust no one: it's the code of survival practiced by martial-arts master Casey Bowman after his life of domestic bliss is shattered by a savage act of violence. Vowing revenge, the fearless American stealthily tracks the killer from Osaka to Bangkok to Rangoon with the help of a wise and crafty sensei. His only clues: a series of victims whose necks bear the distinctive mark of strangulation by barbed wire. Fighting to avenge as well as to survive, Casey must sharpen his razor-like responses and take his battle skills to the next level, even using deep meditation to fake his own death. His target: the sinister drug lord Goro, who is flooding the streets with deadly meth cooked at his remote jungle factory. To prepare for his ultimate confrontation, Casey must finally become an invisible warrior worthy of the name Ninja. But just when his prey is cornered, an unexpected twist shows Casey that his battle is only beginning: he truly can trust no one.

When Nick Davis leaves prison after one year in solitairy, he is hired to operate a forklift in a warehouse in the harbor owned by the Japanese Yakuza patriarch Isshin Tendo. The place is assaulted by the Italian Mafia lead by Dino Campanela and Nick rescues and saves the life of Shuji Sawamoto, who is the representative of Yakuza interests in America. Shuji hires Nick to work for Yakuza and becomes his godfather in the family after his oath to join Yakuza. However, Nick is a lonely FBI undercover agent assigned to penetrate the criminal organization. When the FBI discovers that Campanela is organizing a massive attack to destroy the Yakuza, Nick's boss Littman calls off the operation to leave the dirty work to the Italian Mafia. But the connection of Nick with Shuji and his goddaughter Yuko forces him to help his Japanese family.

A drifter with a mysterious past arrives in a small town and finds the residents in the grip of a ruthless crime boss and realizes he has to help them.

When the Ronin Gang robs an armored car, three cops — Chan, Fong and Wai — go on the warpath. Each has a personal interest in bringing down Ronin leader Tien: he killed Chan's fiancée, humiliated Fong and kidnapped Wai's brother.

A group of former mercenaries reunite to plan an epic heist: boosting a truck full of medicine held by a foreign intelligence agency to supply a refugee camp in need. But when they find the truck is actually filled with stolen gold, the band of brothers realize they’ve been double-crossed by one of their own - and putting the situation right will be all out war.

A Japanese master of ninjutsu and a Chinese expert in kung fu, put their differences aside after their master is killed by a mortal enemy.

In a world where superpowered people are heavily policed by robots, an ex-con teams up with a drug lord he despises to protect a teen from a corrupt cop.