The Gulag - Escape from the Helicopter (Part 2)

Keep running forward along the metal ledge.

When you reach the end, jump across the next gap onto the angled ledge beyond.

Run toward the higher (right) end and jump out into space to grab the zip line.

As Lara slides down the zip line, another rocket destroys the tower where it is anchored.

As soon as you land, begin sprinting forward again, jumping across the gaps in the shifting ice.

...

The last chunk of ice comes to a point. Run out onto the point and jump at the last moment to catch the next zip line.

Again, as you slide, the Trinity gunner fires another rocket at the tower supporting the line.

Lara falls into the icy river and the screen fades to black.