(Important bug warning - You are advised to save MANUALLY at least twice each part. This level can be proved really buggy and make you unable to finish it. If you have not downloaded the PC patch, do it now. Among other fixes, the game autosaves at the beginning of each part. So, in case you activate a bug, you can load an autosave and start from the beginning of the part or level instead of the game.)

Turn around, exit the chamber and drop to the ground.

Preparing the area for the Relic - If you want the Relic, there are some things you have to do first (otherwise, skip to the part of the walkthrough Climbing to the middle level).

With Thor's belt and gauntlets, Lara can move the tall pillar opposite the statue. Grab it and push it to the other side of the depression (as shown in this screenshot). Make sure you push it to the end until it cannot go any farther. Now use the Grapple to catch either metal ring on the screw. This time, move Lara anticlockwise until she reaches the opposite side. Pull the cable to rotate the screw and make it rise. Repeat the same process once more.

In the brief cut scene, Thor lowers his head and brings his hammer back to his chest.

Climbing to the middle level - Climb on top of the lowest pillar where you got the Health Potion earlier. (See this page for the following sequence.) With Thor's statue to your back, look above and to the left to locate the metal ring underneath the serpent statue's chin. Use the Grapple to catch the ring and jump off the pillar. Lara's weight opens the serpent's mouth and toxic water starts falling from there. This means that the water level in the pool is being raised, so you have to move quickly. If the water reaches you, Lara will die instantly. Turn slightly to the left, swing and jump to grab the handhold on the pillar ahead. Jump to grab the handhold above, then jump to the safe ledge on the left.

Alternatively, once you grapple the metal ring, climb up the cable to the top until Lara is hanging beneath the serpent's chin. Turn to face the pillar on the left, but do not swing, because the deadly falling water is just behind you. Press Forward and Jump to leap off the cable and grab the handhold on the pillar. Traverse to the left and pull up on the stone ledge.

Middle level - Go to the right and approach the edge of the ledge. Jump over the toxic water to grab the handhold on the wall (as shown in this screenshot). Climb up to the topmost handhold and traverse to the right. Jump to grab the stone ledge on the right and pull up. You passed from here before when you did the climbing down from the upper level to the middle one.

Once again, jump up to grab the beam and pull up. Walk on the longer beam and this time jump over the gap (this part collapsed earlier, remember?). Jump to the next beam and walk to the other side. Drop to the ground and go to the right. Two mayan thralls attack here, so take care of them.

Getting for the Relic - (This page shows the following process.) Climb on the big stone block and walk to te other side. Jump to the pillar you moved earlier, then to the next one on the left. Jump to grab the edge of Thor's hammer and pull up. Walk to the higher part on the right and press the Interact button to get the Relic from Thor's right eye.

(Note about the Relic - If you cannot get the Relic because you did not move the pillar and Thor's hammer, you still can do it. Return back to the other side of the middle level and use the horizontal pole to lower the water level. Go down and do the two required things: rotate the screw in order Thor's hammer to return back to its original position and move the tall pillar so you can reach it from the stone ledge. For details, see Preparing the area for the Relic above.)

Climbing to the upper level - Walk back to the lower part of Thor's hammer and turn to face the entrance (the statue should be behind you). Look above and to the right to locate the metal ring underneath the serpent statue's chin. Use the Grapple to catch the ring and jump off the ledge. As before, Lara's weight opens the serpent's mouth and toxic water starts falling from there. This means that the water level in the pool is being raised even more, so you have to move quickly. Climb to the top of the cable until Lara is hanging underneath the serpent's chin. Turn slightly to the right if necessary and jump forward to grab the stone ledge; pull up. (This page shows the above sequence.)

Upper level - Climb up the rocks to the left and jump to grab the handhold on the wall (as shown in this screenshot). Traverse to the left around the corner and keep traversing to the end. Jump back to land in front of the entrance.

Before leaving, get the level's last two Treasures. With the entrance on you right and the pool on your left, go to the other side of the ledge, where you will find a stone block (as shown in this screenshot). Passing from this point earlier, you heard the chime signaling the Treasure, but you could not find any. Now, with Thor's belt and gauntlets, Lara can move this stone block. Do it and pick up the two Treasures (49 and 50/50) that were hidden beneath the block.

Returning back - Go through the entrance, which is the exit now since you return back. Head up the stairs until you reach the fallen rocks. Climb through the opening and drop down at the other side. If you did not get the Xibalba Key before, get it now. Get the bike and drive back to the next set of fallen rocks. To continue with the bike, push/ pull the stone block on the left in order to create a passage.

Get the bike, drive up the several flights of stairs to return back to the room with the Lords of Xibalba statues. Three giant spiders are waiting for you here, so either deal wth them or totally ignore them. The stone door opens as you approach, so drive through it.

Drive up the stairs and follow the hallway until you reach the first spiked pit. Jump over and do the same for the second pit. If you did not kill the spiders before, they will follow you up to this point, but they will not be able to pass the second pit, so you are safe.

The wooden ramps of the third spiked pit are down, so you have to raise them. Dismount and jump to grab the horizontal pole on the right hand wall. Climb on it and jump to grab the next pole above. Stand on it and jump to the third pole on the opposite wall. From there, turn to face the third pit and jump to grab the handhold on the pillar. This is a mechanism that Lara's weight lowers and raises the wooden ramps of the third pit. Drop down, get the bike and jump over the pit.

Follow the hallway as it goes until you reach the first room. Place the Xibalba Key in the empty spot to the right of the switch and use the latter to open the exit (which is actually the way you came in). Get the bike and with a good run up, jump over the deep pit in the doorway.

In the cut scene, Lara calls Zip and asks him if he finally could locate where Richard Croft thought Thor's Hammer was. Zip sends the coordinates to Lara's PDA and she also asks him if he has made any progress on the other project. Zip says he has not tracked them down yet and Lara says she will call again when she reaches Jan Mayen Island.