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The robbery was reported around 2 p.m. Friday in the 800 block of Southwood Drive, police said.
The victim, an 18-year-old man, told police he was sitting on a bench when a man approached him and demanded his backpack. The bag contained a PlayStation 3 system, three games and a controller, according to the victim.
When the victim refused to give up the backpack, the other man allegedly threatened to shoot him, pulling up his sweatshirt to display a black handgun tucked in his waistband.
According to police reports, the suspect then grabbed the victim's backpack and ran across a baseball field to a four door, silver vehicle parked on Haven Avenue.
The suspect was described as a white man around 20-years old, with short, dark hair and a medium build. Police reports estimate his height as between 5 foot 7 and 6 feet tall.
Anyone with information regarding this case should contact the South San Francisco Police Department at (650) 877-8900.
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