Fortress Tower - Climbing the Tower - Part 3

The explosion caused by the dynamite in the crate blows out more of the wall, but Lara manages to take cover in time.

When you regain control, jump to grab the horizontal beam just below the climbing wall. From there, jump straight up and press Interact to sink your axe in the rough wall. The wall starts to crumble as you climb, so keep moving. Climb to the right. Then jump to grab the wooden beam. Climb along it to the right and jump to the next section of climbing wall.

When you make this last jump, you'll need to press Interact twice: once to latch onto the wall with the climbing axe and again in time with the on-screen prompt to prevent Lara from slipping.

After that, continue climbing to the right and upward. When you reach the horizontal crack, jump straight up past it and press Interact again to latch on with the axe. Then continue climbing all the way up the wooden slats to the roof.

When you reach the top a cut scene begins. Lara calls out for Roth over the radio. As she climbs onto the roof's peak, the helicopter rises up on the other side of the building with Roth standing inside. He urges Lara to jump, but before she can do so, explosions destroy the roof...

...and she falls onto a ledge inside the burning tower.

When you regain control, you receive 100 XP for your efforts thus far. Don't hesitate now or the ledge will collapse, and Lara will fall into the inferno. Run forward toward the helicopter and jump at the edge of the ledge.