When playing on Countdown in multi-player mode, find the ramp between the two energy shafts were the Energy Sword is located. Turn towards the rest of the map then move to your right. Exit the room with the energy shaft and move towards the corner to your right by walking across the bridge to the east past the Energy Sword. Remain at that location until you begin to hear radio transmissions. Note: The radio is in the eastern corner of that location.