Found a diagram with a brick wall at the end of the game. I then found symbols all over them withe the order you had to press the bricks in but i thought they were scattered randomly until i found a map in the pentangle complex showing me the locations of these clues. Behind that was a puzzle where you had to match up lights and sounds heard from a door in the radio complex I still have not solved the last puzzle to find the medallion but when I do solve it I would be happy to help MaG with a walkthrough