Successfully complete the game and save the game. Instead of starting a new game, load your completed game file. Proceed to where you enter the basement from the elevators. Go to the second room before fighting Inhert. Kill all enemies in this room. Go to the bottom of the room and to the second level of the moving pillars. Note: Counting from the bottom upwards, this is the second to last level of moving pillars. When the pillars retract, go around the corners. The icon is located on one of the corners. You must be close to the corner to find it.