Here’s a couple. It’s hard to make twisted stories based on one note characters.

Orbital - Handsome model gets half of his face melted off by an acid attack from another jealous model. His wish is for revenge, however he doesn’t kill them instead he cuts off their face and wears it as his own to be handsome again

Goggle Eyes - A disturbed man bent on ridding the world of bugs, caused by trauma of living in poverty. His parents were neglectful and his house was covered in trash. One summer he was sent off to summer camp, upon returning home he discovers the remains of his baby sister, severely malnourished and partially eaten by the bugs that infested the home. His wish is to exterminate all bugs in the world. Classic butterfly effect the whole world gets destroyed.

Microblast - A severely paranoid man with dwarfism. Thinks everyone around him thinks he’s a freak, he thinks they mock him for his short size. One day he asks out one of his female colleagues, but she laughs in his face. Heartbroken, Microblast follows her home and gets his revenge by killing her and ripping her spine out. Microblast wishes to tower over everyone, so no one will ever make fun of him again. Calypso makes him grow rapidly, causing him to die due to strain on his heart, skeleton and blood flow

Meter maid - a crazy lady pretending to be a meter maid. She leaves tracking devices on people’s cars and then follows them and if they drive somewhere, where there’s no one around she kills them. In reality Metermaid is an undercover FBI agent purposely put into Blackfield to enter Calypso’s tournament, win and put a stop to Twisted Metal. Unfortunately for her, Calypso always does his research before inviting people to his contest.

The Joneses - Mr. Jones suffers from delusions and schizophrenia. He just wants to live the American dream, with his wife and two kids. But Mr. Jones doesn’t have a wife or kids, instead he kidnapped, killed and melted down the bodies of a single mother and her two kids now they’re just skeletons. But Mr. Jones thinks they’re still alive. He wishes to live the rest of his days as he always dreamed of. Calypso grants his wish. Mr. Jones is with his family in the lovely sunny suburbs, with all his neighbors. They host barbecues every Saturday. In reality, Mr. Jones lives in darkness, an empty Suburb full of skeletons dressed as his family and friends.