Backstabber (2011)

A group of high school outcasts get revenge on the students that torment them.

After witnessing his parents' brutal murder on Christmas Eve, Billy transforms into a Killer Santa, delivering a yearly spree of calculated, chilling violence. This year, his blood-soaked mission collides with love, as a young woman challenges him to confront his darkness.

A deep-sea salvage expert enacts an elaborate plan to infiltrate and take revenge on a criminal organization that dealt him a foul misdeed.

A group of young activists set out to make an environmental statement by vandalizing a home superstore as it closes. But their plan goes terribly wrong when they become trapped inside and must face a deranged security guard with a gruesome passion for primitive hunting. As the night fills with violence and terror, the teenagers find themselves in a desperate fight for their lives.

Jen and a group of friends set out to hike the Appalachian Trail. Despite warnings to stick to the trail, the hikers stray off course—and cross into land inhabited by The Foundation, a hidden community of mountain dwellers who use deadly means to protect their way of life.

Eight different people are invited to their 10-year high school reunion at their now-closed down high school where a former student, disfigured from a prank gone wrong, is there to seek revenge.

Dominic Toretto and his crew battle the most skilled assassin and high-performance driver they've ever encountered: his forsaken brother.

May Munro is a woman obsessed with getting revenge on the people who murdered her parents when she was still a girl. She hires Ray Quick, a retired explosives expert, to kill her parents' killers. When Ned Trent, embittered ex-partner of Quick's, is assigned to protect one of Quick's potential victims, a deadly game of cat and mouse ensues.

Walden Dean is a stenographer, whose mind witnessed all types of injustices in the courtroom. After discovering he has a terminal illness, repressed anger deep within him surfaces -- taking justice into his own hands in the most gruesome ways imaginable.

A group of teachers must defend themselves from a gang of murderous kids when their school comes under siege after hours.