THE NUMBERS ON THE MAP FOR THE PLATES ARE NOT IN THE ORDER THAT YOU MUST STEP ON. They are in order from the entrance. The order in which YOU MUST step on is below !!! I made a map and guide of where the plates are and in which order you need to step on the plates. If you step in the right plate, it will make a loud noise and then the noise will stop. This will happen every time you step on each plate. If you step on the wrong plate in wrong order, the noise will continue untill you get off the plate/plates. You must step on 4 plates in the correct order to open door. There are 5 plates but only 4 work. Not the fanciest map but it works !!! [IMG]http://i58.tinypic.com/8vx8c6.jpg[/IMG] The numbers in the circle means the plate number not the order. The plates are not right in the middle, you will have find exact location but i have given the general area. Plate number 3 is the hidden one with a door and a hole right above the door which you must jump and go through. Use your ghost to see the outline of the hole above the door if you are having trouble seeing it. On plate number 5 you have jump pass some rock columns to get to it. Plate order: Plate #3 is the 1st plate you must step on ( hidden one) Plate #2 is the 2nd plate you must step on Plate #1 is the 3rd plate you must step on ---------- ( there is a calcified fragment on top of a rock on the right side when facing the door behind the plate.) Plate #5 is the 4th plate you must step on Plate #4 does not do anything to my knowledge You will hear a door opening if you have done this correctly. The chest is located right across golgoroth cellar/ exit. Enjoy !!!! Edit 1 : as pointed out by redslay5. Make sure ure completely off the plates before the first guy steps on, if not it wont work. The plates are pretty big so just stay clear off them till its time to step on it. It happened to us too. Edit 2 - added location of a calcified fragmen by plate number 1 !!!