Brothers a Tale of Two Sons

This is unlocked at the very start of Chapter 6. As you row down the river , at the first chance you get to go left or right , you should see on the right a blood filled waterfall. Row though the waterfall to witness the ceremony, after a short cutscence the achievement will unlock.

At the start of Chapter 6 when you enter the boat, row around to the right where the red waterfall is and sail through the gap to the left of where the waterfall is, keep going until a cutscene kicks in and the achievement will pop.

This guide will walk you through all of the achievements in just 2 hours, timestamps are below the video


ACHIEVEMENTS LIST TIMESTAMPS
0:00 – Intro and Prologue
3:27 – Take a Break Achievement
10:37 – Chapter 1
10:57 – Wishing Well Achievement
14:39 – Love Birds Achievement (Part 1/2)
15:00 – Bunny Buddies & Black Sheep Achievements
24:14 – Chapter 2
42:45 – Chapter 3
44:06 – Falling Star Achievement
51:55 – Chapter 4
52:15 – A Sad Tune Achievement
58:00 – Windpipe Achievement
59:50 – Love Birds Achievement (Part 2/2)
1:14:03 – Chapter 5
1:18:00 – Call of the Giants Achievement
1:23:34 – Chapter 6
1:24:06 – Behind the Curtain Achievement
1:28:10 – Turtle Soup Achievement
1:30:45 – Whale Song Achievement
1:38:04 – Chapter 7
1:54:26 – Epilogue