Tomb Raider Underworld Strategy Guide 45: Arctic Sea, Part 5
Now, go to the end of that balance beam and jump up to another area where balance is important. Jump to another ledge, and then walk to the red areas on the floor. You will see a cutscene where Lara opens a door to another area.
From here, it becomes a matter of running down a hall and taking out trolls on the way. I think there are three towards the end that you can shatter to pieces with a strike from the hammer.
From there, it is a cutscene with Natla and the doppelganger. Watch what happens, and then watch as Amanda and you team up. You will then be in a hall again, but you will come to another area. Run to the center of the area, hang off a ridge, and drop down. Go ahead and cross a bridge, then run to where Natla and her evil machine will want to poison the world, and only you can stop her.
Start by going to the right, and stop to destroy a monster. Jump a small crack in the bridge, and then keep running until you reach the end, where the path sticks out slightly. You will want to jump to the floating carts that are encircling the evil machine.
When you arrive at that point, you will note that Natla will want to attack you. Fortunately, her bolts will arrive slowly thanks to adrenaline, and you can move Lara out of the way.
After you have jumped to the cart, you will reach an area that has a ring. Go ahead and use the Grapple when the “B” prompt shows up, and then hang down and release more slack until you are touch the floor.
From there, it is a matter of jumping from platform to platform. Nothing new here. Jump the first, and you might not think you can jump to the next one, but you can. Note Natla will try to attack again, so get out of the way of her death-bolt. Jump to the next spot, and the next, until you will need to jump high to another spot.
When you get to this spot, go walk up to the weird sign on the wall and push it in all the way. This will open something up on top, and the next step is getting there.
Start by letting go and doing a chimney jump. You will soon reach a place with a ledge on both sides, but you want to be on the one on the left. Jump up twice to that ledge, and shimmy left until you can stand up.
