Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A faint glimmer	Warm up the ballast in chapter 6.
Acrobat	Complete more than 200 jumps or double jumps in one game.
Adventure buddies	Hug the ballast.
An ear to the past	Listen to a shell.
Angel's carabiner	Place a piton at the top of a wall run.
Antique gallery manager	Activate all frescos.
Avid reader	Read all letters.
Awakened memory	Use the echo on a frozen ballast in Chapter 6.
Back in motion	Turn an altar.
Bogeychoco	Scare more than ten chocos back to their burrow.
Collective climb	Stop 25 pebbles with a single echo from the ballast.
Common ground	Complete all cairns.
Cycle celebration	Turn all altars.
Echo from the past	Activate a fresco.
Final ascent	Read all of Bianca's journal entries.
First contact	Read a letter.
First stone	Complete a cairn.
Fresh air	Restore your stamina more than 50 times while climbing.
Restored connection	Hug the ballast twenty times.
Sound archeologist	Listen to all shells.
Water piper	Complete the game.