The family of missing student Shane Montgomery, 21, of Roxborough, has added $10,000 to the reward for information in his disappearance, bringing the total to $50,000.
Montgomery has been missing since early Thanksgiving Day, when he left Kildare's Irish Pub on Main Street in Manayunk.
The FBI has joined Philadelphia police in the search for the West Chester University student.
Authorities and the family have asked for the public's help in recovering security footage from the area, where cameras are few and far between.
Montgomery's uncle Kevin Verbrugghe said donations had provided some of the additional reward money. The family initially put up $10,000.
"Hopefully, with the raising of the reward money we'll get a break, and someone will come forth," he said.
On Sunday, volunteers will head to the Eagles-Seahawks game, where fliers will be distributed.