a guy is in riot gear and kills lots of people

One night per year, the government sanctions a 12-hour period in which citizens can commit any crime they wish -- including murder -- without fear of punishment or imprisonment. Leo, a sergeant who lost his son, plans a vigilante mission of revenge during the mayhem. However, instead of a death-dealing avenger, he becomes the unexpected protector of four innocent strangers who desperately need his help if they are to survive the night.

In RoboCop, the year is 2028 and multinational conglomerate OmniCorp is at the center of robot technology. Overseas, their drones have been used by the military for years, but have been forbidden for law enforcement in America. Now OmniCorp wants to bring their controversial technology to the home front, and they see a golden opportunity to do it. When Alex Murphy – a loving husband, father and good cop doing his best to stem the tide of crime and corruption in Detroit – is critically injured, OmniCorp sees their chance to build a part-man, part-robot police officer. OmniCorp envisions a RoboCop in every city and even more billions for their shareholders, but they never counted on one thing: there is still a man inside the machine.

In a violent, near-apocalyptic Detroit, evil corporation Omni Consumer Products wins a contract from the city government to privatize the police force. To test their crime-eradicating cyborgs, the company leads street cop Alex Murphy into an armed confrontation with crime lord Boddicker so they can use his body to support their untested RoboCop prototype. But when RoboCop learns of the company's nefarious plans, he turns on his masters.

In a dystopian future, Dredd, the most famous judge (a cop with instant field judiciary powers) is convicted for a crime he did not commit while his murderous counterpart escapes.

In the future, America is a dystopian wasteland. The latest scourge is Ma-Ma, a prostitute-turned-drug pusher with a dangerous new drug and aims to take over the city. The only possibility of stopping her is an elite group of urban police called Judges, who combine the duties of judge, jury and executioner to deliver a brutal brand of swift justice. But even the top-ranking Judge, Dredd, discovers that taking down Ma-Ma isn’t as easy as it seems in this explosive adaptation of the hugely popular comic series.

Three inept night watchmen, aided by a young rookie and a fearless tabloid journalist, fight an epic battle to save their lives. A mistaken warehouse delivery unleashes a horde of hungry vampires, and these unlikely heroes must not only save themselves but also stop the scourge that threatens to take over the city of Baltimore.

In 1985, the murder of a government-sponsored superhero draws his outlawed colleagues out of retirement and into a mystery that threatens to upend their personal lives and the world itself.

In a bad neighborhood, on his way to a laundromat to do his laundry, Frank Castle witnesses a ruthless street gang harassing several people.

The avenging angel of Marvel Comics fame comes brilliantly to life in this searing action-adventure thriller! Dolph Lundgren stars as Frank Castle, a veteran cop who loses his entire family to a mafia car bomb. His ex-partner believes Castle survived the blast and became the Punisher, living in the sewers and exacting vigilante violence against mob bosses throughout the city. When the populace is caught in the midst of a gang war that he caused, Castle must again emerge from the shadows and save the innocent.