[Checkpoint] The level begins where the previous one left you. Follow the tunnel to a room with a pit. Jump to land on the vertical structure, then jump to grab the horizontal pole. Jump to the next two vertical structures, then to the ledge in the corner. If you accidentally fall down, you can climb back up, using the ledges at the back, and start again. Jump to grab the ledge on the left and pull up. Follow the passage to the next room. [Checkpoint]

Room with stone bridge - You reach a room with a stone bridge. The only accessible opening at the moment is the one ahead. When you step on the first part of the ramp, the ball starts rolling. Run back and turn to either side. The ball will destroy a part of the bridge, revealing a pillar, and make three gates close in the passage it rolled from. The deal is to open the three gates and gain access to the next part of the level.

Return back to the entrance and climb down the ledges on the right to reach the bottom of the pit. Pick up the Caliber Pistol Ammo from the right and push the movable box beneath the ledges you came from, so you can return back. Go to the other side of the pit and push/pull the tall pillar close to the left hand opening (if the entrance is to your back - see this screenshot to get oriented). Climb back up, cross the bridge and go to the left. Jump on the wooden platform of the pillar and then to the next ledge. Jump to grab the crevice in the wall, then the next one. From there, jump to grab the crevice of the pillar on the right, then the top; pull up.

Jump to grab the vertical pole, then jump to the ledge above the opening with the three closed gates. Draw weapons and shoot the gold ring that holds the structure above the bridge. It will fall down, destroying another part of the bridge. Use the Grapple to catch the two gold rings above and swing to the opening above the entrance. Use the switch to open the first (outer) gate. [Checkpoint] Use the Grapple again to catch the rings and return back. Make your way to the left hand opening.

Left hand opening - Follow the passage to a pit and pick up the Shotgun Ammo. [Checkpoint] Carefully pass the dart trap and jump to grab the horizontal pole. Swing and jump to grab the crevice ahead. Jump to grab the next three crevices on the left, passing two dart traps. When you reach the third crevice, jump to grab the ladder behind you. When you are ready to pass the dart trap, jump to grab the crevice on the right, then the next one. Jump to land on the vertical structure and, before losing your balance, jump to the safe ledge ahead. Pick up the Small Medipack and follow the passage around to the left. Pick up another Small Medipack and enter the next room. [Checkpoint] Pass the two sets of dart traps and go up the steps. The next passage gets you to a second set of dart traps that you have to pass.

Room with broken stairs - Use the Grapple to catch the gold ring above and swing to the broken stairs ahead. You cannot reach the switch from here, so jump to grab the vertical structure on the left, then the horizontal pole. Swing and jump to grab the crevice ahead. Jump to grab the ledge above and pull up. Go around to the left and pick up the Caliber Pistol Ammo. Jump to grab the stone ledge above the switch, then release to grab the switch and open the third (inner) gate. [Checkpoint]

Return back to the passage, but be careful because there are more dart traps. When you pass them, follow the passage to the previous room. This time, there two moving blades between the darts, so carefully pass them. Draw weapons, because you are not alone. A raptor will attack when you enter the next passage, so kill it. Return back to the pit and pass it once more to get back to the room with the stone bridge.

Back to the room with the stone bridge - Use the crevices you came from to return to the bridge and, again, make your way down to the pit. Push/pull the two pillars so you can reach the right hand opening (see this screenshot to get oriented). Climb back up, cross the bridge and jump from pillar to pillar until you reach the right hand opening.

Right hand opening - Follow the passage to a pit. [Checkpoint]

Artifact #1 - Hang from the edge of the pit (as shown here) and release to grab the crevice below. Drop to the ground and go to the other side of the pit. Pick up the Artifact and return back. Grab the vertical structure, climb to the top and jump to the ledge you came from.

Jump to land on the vertical structure, avoiding the darts. Jump to grab the crevice in the left hand wall and, avoiding the next darts, jump to grab the crevice on the right. Release to grab the lower crevice and traverse to the right. Jump to the vertical structure behind you, then to the safe ledge ahead. Follow the passage to the next room. [Checkpoint]

Room with floor that collapses - Pick up the Shotgun Shells from the left. When you approach the switch at the other side, the floor collapses, revealing a room below. You will slide into this room, but do it with your weapons drawn, because two wolves attack down there. Once you kill them, go up either ramp and pull the movable cage out of the alcove. Throw it to the ground and position it next to the right hand pillar (assuming you are facing the slope you slid before - see this screenshot).

Climb on the cage and jump to grab the small crevice of the pillar, then the next one. Jump to grab the vertical pole behind you and then the next one. Alternatively, once you pull the cage out of the alcove, position it to the edge of the platform. Climb on the cage and jump to directly grab the second vertical pole (as shown here - thanks to dinahcat for the tip). Jump to grab the crevice of the other pillar and traverse around the corner. Jump to grab the horizontal pole behind you, swing and jump to grab the stone ledge in the corner; pull up. [Checkpoint] Jump to grab the next two crevices and traverse to the right. Jump to grab the vertical pole behind you and climb to the top.

Artifact #2 - Before jumping to the switch, notice the opening on the left (as shown in this screenshot). Jump to grab the edge, pull up and pick up the Artifact from the left. Then jump back to grab the vertical pole you came from.

Jump to grab the ledge above the switch, then release to grab the switch that opens the middle gate. While hanging from the switch, jump to grab the horizontal pole on the right. Swing and jump to grab the crevice in the wall. Climb up the crevices to reach the opening above. Go around to the right and drop down. As you return back through the passage, a raptor will attack from around the corner, so stay sharp. Once you kill it, follow the way back to the pit. There is another raptor down there, but you do not have to deal with it if you are not interested in all kills (unless you missed the first Artifact and want to go down). Pass the pit as you did before and return back to the room with the broken stone bridge.

Back to the room with the stone bridge - Jump on the two movable pillars to reach the ramp with the now open gates. Go up the ramp and follow either way to reach a second ramp. Go up it to reach the next room. [Checkpoint]

In the cut scene, Lara approaches the pedestal with the piece of Scion, but she passes it by. She goes up the steps and approaches the statue with the two mummies alongside. Lara starts reading the inscription "Here sits the God-King Qualopec; One of the Triumvirate; Keepers of the Three pieces of the Scion; Diviners of its knowledge; Sacred rulers of Atlantis". She then approaches the statue even more and the right hand mummy awakes and falls down. Lara hops back and draws weapons. When everything seems quiet, she steps back and takes the piece from the pedestal. This causes an earthquake and rocks start falling from above. Before they block the entrance to the room, Lara manages to take a last glimpse of the statue that has come to life.

[Checkpoint] Do not worry about the statue at the moment; it will not come after you. With the Scion of Qualopec in your backpack, go down the ramp and return to the room with the stone bridge. Jump over the gaps to get back to the entrance. Go down the ramp to reach the first pit. There is a raptor down there, but deal with it if you want all the kills. Pass the pit as you did when you started the level or drop down and climb out from the other side. [Checkpoint] Follow the tunnel back to the Lost Valley.

In the cut scene, Lara jumps into the pool. When she surfaces, Larson is waiting for her. However, she is not surprised to him here.

Be prepared for the Interactive cut scene. Press the correct buttons to save Lara from Larson's attack.

In the next cut scene, Lara has disarmed Larson. She shows him the artifact and, since this is only one piece of the Scion, she asks where the rest of it is. Larson is not willing to tell, so Lara points her guns to his head. This does not make any differnce for him, since Pierre has probably already found his piece. Lara asks for the location, but Larson does not know. She seems to believe him, so she decides to leave. It is then when Larson grabs his Shotgun, but Lara has guessed his move, kicks him and he falls unconscious to the ground.

(Note: If you did not find the Shotgun in Lost Valley, you will get it from Larson.)

The cut scene shows Lara at the top of an elevator. She uses her gun and cuts through a cable that holds the elevator (she probably did not find any unsecured door). When the cable is cut, the weight on the other side starts falling down and Lara hoists up. She releases the cable and she lands on the roof of Natla's Technologies building. She spots a glassed hatch and uses it to enter Natla's office. Opposite the desk is a big TV screen. Lara uses the remote control to turn the TV on. From the various options, she selects Larson's name. In the recorded movie, Larson talks with Natla, and it is obvious he was following Lara all along. She then selects Pierre's name. The recorded movie shows Pierre talking with Natla. He tells her that he has located his piece of Scion while he shows the location at the same time. Lara recognizes the place; it is St. Francis Folly.