The suspect posed as a customer at the store at 9700 Woodman Avenue at about 11:20 a.m. on July 8, telling the clerk that he wanted to sell back a video game, said Detective Juan Santa of LAPD Mission Division.
He then pulled out a gun that was partially covered by a black T-shirt and told the clerk, "Give me the money or I'll blast you," Santa said.
The suspect told a boy who was browsing nearby to go look at games in another part of the store, Santa said.
"That kind of ups it, that he's willing to do this in front of the little kid and possibly put this kid in danger," Santa said.
The suspect fled with $198.99.
He was described as a 25- to 30-year-old Latino male about 5-foot-5 to 5-foot-6, weighing about 190 pounds with a mustache and goatee. He was wearing a white T-shirt, black and gray plaid shorts, and a black Kings cap.
Anyone with information more information is asked to call Santa at 818-838-9893 or 877-LAPD-24-7 during non-business hours. Those wishing to remain anonymous can call Crime Stoppers at 800-222-TIPS (8477).