Disclosed herein is a portable digital communication device usable as a gaming device and a personal digital assistant. The device comprises a body housing, a center sliding housing for opening or closing a top surface of the body housing while being continuously opposite to the top surface of the body housing, and at least one side sliding housing attached to a side surface of the body housing and adapted to slide while being continuously opposite to the side surface of the body housing. The side sliding housing is arranged in parallel with the center sliding housing.