Half-Life 2 Episode Two-Riding Shotgun

Having acquired transportation, Gordon and Alyx proceed at top speed to White Forest. They discover a radio tower and Alyx decides to try and contact White Forest to warn of the impending attack. While establishing power to the transmitter, Hunters arrive and ambush them. It is the first time Hunters are fought directly, and are defeated. White Forest base is contacted, but Advisors appear to be blocking the transmission.