Presented as a lost film that was banned in the 1980s, it tells the story of a masked killer known as Motherface, who targets fraternity brothers.

Delta Bi member Brock Chirino talks to his therapist about the multiple slasher-related attacks on his fraternity because of their pranks.

While member Road Doggie loses his frisbee outside, the mother throws a buzzsaw at his mouth, partially decapitating him.

Inside, Cindy performs oral sex on C-Trunk, only for the mother to sneak under the bed and kill them both with a harpoon, before stabbing Coach Handsey with a javelin in the locker room.

The mother goes on a rampage, hacking one to death in the shower with two meat cleavers, stabbing one through the mouth with a javelin, and decapitating one with a machete.

After Scooter's head explodes, Brock and his friend Samzy manage to kill the mother, only for her daughter to cut off her face and use it as a mask, taking up the name Motherface.

The next day, Delta Bi finds ZQ's corpse and runs into the house, with Turbeaux knocking out Samantha with a baseball bat.

Motherface throws his head through the window and uses a device to make Samzy rip out his tongue by the lake before drowning him.

Samantha finds Sizzler's body and reveals to Brent that Todd impregnated her before Motherface appears behind her with a fire poker and stabs her through the stomach, killing her child.

[5] Dude Bro Party Massacre III premiered at the Los Angeles Film Festival on June 13, 2015.

[9] Carlos Aguilar of IndieWire wrote, "Its form and its ideas come together in a disgusting, profane, vulgar, and psychotic concoction that will become, without a doubt, an instant cult classic.

[13] Comparing it to Wet Hot American Summer, Mark L. Miller of Ain't It Cool News called it "some of the dumbest fun you're going to have while watching a horror film this year".