There are five radios hidden throughout the map.
Radio 1 Edit
Ludvig Maxis: Reality itself is shifting. I find myself reflecting on memories I am not longer sure are my own. Beyond the window, I saw a wasteland stretching far as the eye could see. I saw scourge visited upon the Earth. I saw the children withered before my eyes. That was before... before he came. Samantha has been returned to me once more, as have you Edward... as have you.
Radio 2 Edit
Ludvig Maxis: He explained everything to me, he will explain everything to you. Though his very presence defied logic, defied reason, he told me that he would help. I could not refuse.
Radio 3 Edit
Ludvig Maxis: The siren has not sounded in many months. I am... confused, by the changing world around me. I look at my hands, and they are not the hands I remember. The wrinkles, stains and liver spots that textured my skin have disappeared, as though time itself was unraveling against its natural order. Is this the end, or a new beginning?
Radio 4 Edit
Ludvig Maxis: After so long in isolation, we have begun to believe that we were the only survivors of the catastrophic event that had shaped our lives. Supplies were beginning to run low, and I was forced to prepare for the worst outcome. Just as I feared that we were truly alone, just as I feared that the end was near, there was a knock at the door.
Radio 5 Edit
Ludvig Maxis: You swore a promise to me, Edward. It may have been a long time ago, but I am sure you would not have forgotten. You swore to follow my instructions, to comply to my every order. You swore to enact whatever plan I conveyed to you, all in hope that we could overcome some of the chaos that ourselves have created. You have kept your word. However much it pains my heart, I owe it to you to confess. I'm sorry Edward, I have withheld certains truths from you.