The suspect is accused of fatally shooting Raymond Galloway while he was sleeping about 5:50 a.m. Sunday after the two got into an argument related to the gaming system, the Chicago Tribune reported.
Police said the 13-year-old, who has been charged as a juvenile with first-degree murder, admitted to the crime while his mother was present.
It was unclear where the boy got the gun. No adults have been charged in the case.
2014: The Year in Music [PHOTOS]