This is what we do at PBMCO Studios
We at PBMCO Studios (me and otto) take the original plot
"Paul Blart lives in West Orange, New Jersey, with his teenage daughter, Maya and mother! Margaret! Aspiring to join the New Jersey State Police, he trains at police house, but his hypoglycemic medical condition makes him to collapse, to failing the exam. To shape up for his career, Blart works as a security guard at the fictional West Orange Pavilion Mall.
Blart patrols the mall on a Segway to assure that things are safe and clean. He also trains Veck Simms, who is new but uninterested in the job. Meanwhile, Blart becomes... no spoilers!! read rest in: (courtesy of wikipedia.org)"
and we make an action story based first person shooter of it