Part 13

Navigate past dead giants by using the surrounding rock plateaus and a wood axe as a bridge.

Push an arrow mechanism with both brothers to open a path, followed by a cutscene.

Follow the river under the giants, then jump right and use a small branch to cross to the other side.

To the right, find a crossbow. Before using it, jump right to a gap to find a large horn.

Use Big Brother to blow the horn and earn the "Call of the Giants" achievement. Little Brother cannot blow the horn.

Return to the crossbow. Use both brothers to pull the white handles to ready the arrow.

Go to the back of the crossbow and interact with the lever as Big Brother to fire the arrow, causing the dead giant to fall and open the path.

Slide down the rocks and cross the river back using the white tree branch.

Follow the open path, hopping down rock levels and jumping over a gap with red water.

Sidle under a waterfall, triggering a cutscene.

Enter the cave, traverse past a cauldron, and enter the river. Exit on the left.

Walk to the overlook of the shrine and proceed onto the rafter-structure.

Tip-toe across the rafter and descend to the bottom steps of the shrine.

Position both brothers under the blood streams. Have Big Brother stand in front of the picture and interact. Then, have Little Brother interact to jump on Big Brother's shoulders, mimicking the picture.

Head up the steps and approach the tribe of cultists. They will bow and part for you.

Walk to the woman being offered as a sacrifice to trigger a cutscene, marking the end of Chapter 5.

Begin Chapter 6 by heading down the wooden dock and into the canoe.

Big Brother controls the left paddle, Little Brother the right. Paddle straight initially.

Turn right towards a blood waterfall. Go between the two pillars to trigger a cutscene and the "Behind the Curtain" achievement.

Paddle back through the blood waterfall and continue through the snow-capped river.

Navigate through killer whales that create waves. Be aware they can push the canoe and potentially cause a game over.

Dock between the bones of a large skeleton at the end of the river.

Follow the woman to the floating ice levels.

Jump across the floating ice until you reach snow land again.

Continue following the woman to a huge turtle (the mother).

Hop down to the lower area to the right of the Mother Turtle.

Find and return three baby turtles to their mother to earn the "Turtle Soup" achievement. The first turtle is on the ground where you dropped down. The second is up the path next to the drop-off point.