Alternative achievement locationYou can also get this achievement on Episode 3 "The Keep" progress into the mission until you meet with the NPC strapped to a chair with a massive ball of energy/electricity behind him, he will offer you help and send you to get some explosives, leave this room and go through a door, you'll be in a walkway area with multiple rooms and 2 bridges, from the starting point turn right over the first bridge and go into the room near enough in-front of you, it will be a communications room with radio's around, wait around this room for a few seconds and a phone will ring, go and answer it with the button prompt and get your achievement.