Cleopatra's Palaces
Head down the corridor to a room with plants and a large fountain. Run across the room, to the North wall, and head up the stairs. In the next room, head up the ramp to the room above. Here you'll find a wall tile with a face on it. It is a secret door—use the Crowbar to open it and head on through. Move through the corridor until you reach the next face tile. Use the Crowbar to pry it open, revealing another secret passage.
At the end of the passage, you will find a hole that leads to a slide. The slide leads to some water. As you are about to slide off into the water, Jump to the left and head down the water path. At the end you will find the fourth Black Beetle. Use the Crowbar to dislodge it, then do a Roll Turn and a Running Jump from the edge to the platform on the other side of the water. From this platform, turn so that you can see the opening high on the West wall. Unfortunately, you'll have to drop into the water, then quickly Jump up and Grab the opening above.
Head back to the beginning of the level and back to the Temple of Isis. Once back at the Temple, head to the room with the black pyramid in it. Here you will place the four Black Beetles into the pyramid. This will cause a series of four panels to raise, then disappear into the floor. A beam of light will shoot upward, supporting the tip of the pyramid. From this, you can hit the Action button to obtain the Mechanical Scarab. Go to your inventory and combine the Mechanical Scarab with the Winding Key; you will need to make use of this when you return to Cleopatra's Palaces.
Upon re-entering the fountain room, head back to the stairs in the North wall. Go up the stairs and continue straight to the back of the room. You will find an area with a big eagle painted on the wall and a beetle painted on the floor. You will notice some holes in the floor behind the painted beetle. They are spikes. Use the Mechanical Scarab with Key to deactivate the spikes. It will sit over the hole in the middle of the painted beetle, then tear through the spikes, so that you can safely cross the spike holes. When you arrive at the other side, pick-up the Scarab and continue on. In the next room, go through the opening in the North wall. In the next, you'll find a casket and some blades that start to swing above the door.
Open the casket to find the Right Gauntlet. Take care of the skeleton that appears and head back to the previous room. Head through the opening in the East wall. Take a right as you move through the opening and make use of the Mechanical Scarab with Key to take care of the spikes. On the other side, pick up the Scarab and head up the stairs in front of you. In the next room, a golden eagle will attack. Take care of the eagle, then head though the opening in the West wall. Down the corridor and around the corner there is an alcove with double doors and a lever high on the wall. Stand under the lever and Jump and Grab it.
Doing so will open the double doors and raise a block next to you. Climb up on the block. Face West, then Jump from the block and Grab the ledge. Shimmy around the ledge until you can stand up. Climb up and head down the corridor. Go through the opening in the North wall to the next room. Push open the casket to obtain the Right Greave. A skeleton will attack. Take care of him and carefully pass the blades that are now swinging above the door and exit the room. Head back out into the corridor and drop back down to the area where you Jumped and Pulled the switch before you did all of the Shimmying.
Head South and go through the opening on the East (left) wall at the end. As you turn the corner, you will find a new opening on the left-hand wall. Go through and open the casket to collect the Pharos Knot. Exit the room, turn left, and head East down the corridor until you come to some stairs on your left. Go past the stairs and down the corridor that is behind them. In the next room, there are a few stairs that lead to a locked door. Place the Pharos Knot in the keyhole to open it. Enter the room. You will find two blocks in the center of the room. Climb the one closest to you.
Pick up the Small Medipack and two yellow helixes will appear over the two blocks. The other block features a gold statue of Lara. Do not shoot it, as you will take damage. A block will appear on the North side of the room. Climb it, then Jump and Grab the ceiling texture. Grapple over to the other side and drop onto the block. Walk to the end of the corridor and turn around. Jump up, Grab the floor above, and Climb up. You will be in an open area above the yellow helixes. Take out the golden eagles.
Go to the small extension that occurs in the middle of the path that you are on. Facing West, do a Running Jump over to the other side. On the North wall on this side, you will find an opening high above. Jump, Grab, and Climb into it. In the next area, both a skeleton and a golden eagle will attack. Take care of them and Jump out to the suspended platform in the middle of the area. You will notice levers high across from you, on both the East and West sides of this platform. You must Jump from the edges and Grab the levers. When you release a lever, a golden eagle will go after the Lara statue below. Drop from the lever to the platform below, then down to the statue. Take care of the buzzards.
Doors will open on both sides of the room—behind and under the switches. The door on the West side contains an Ornate Handle. The door on the East side contains the Hathor Effigy. After snagging it, do a Running Jump back over to the suspended platform in the center of the room. From here, Jump over to the door with the face texture on the South wall. In your inventory, combine the Hathor Effigy and the Ornate Handle to create the Portal Guardian. Place the Portal Guardian on the pole next to the door to open it. Now, go through the door and blow the skeleton's head off. A cut scene will follow. Two of Cleopatra's guards will go on the attack. Use your most powerful weapon to destroy the first one. The second one has decided not to fight.
After taking care of the guard, head through the doors behind them. One room contains a casket that is home to the Breast Plate. The other contains the Left Greave. After snagging these last two pieces of Armor, head toward the throne that Lara was sitting on in the cut scene. There are two holes that have opened up on either side of it. Drop into either hole to bring Part IV to an end.
