GRIS

Story. Complete Chapter 1 (the red desert-ruins) by restoring the red colour region - pops at chapter end.

Story. Complete Chapter 2 (the green forest). Restoring green ends the chapter.

Story. Complete Chapter 3 (the blue underwater / rain area).

Story. Complete Chapter 4 (the yellow wind / gravity area).

Story. Finish Chapter 5, the final chapter.

Chapter 5 climax. After surfacing from the black water, sing in front of the tomb / gravestone - the narrative resolution.

Chapter 4, checkpoint 2 (the turtle sequence). Head down into the darkness, then move left into a hidden area rather than continuing along the main path.

Chapter 3. Lead the apple-eating forest creature to eat all 8 apples - 4 of them are hidden off the main path, so feed it those too.

Chapter 4, checkpoint 2 (the giant eel chase). Get through without being caught by any of the eel's lunges - dodge every attack (no combat, pure evasion).

Chapter 2 (from its second checkpoint on). Smash all 14 little stacked-stone statues (inuksuit) with the heavy / block slam.

Chapter 3, checkpoint 2. Find the statue of a figure covering its face and sing in front of it (you'll have the sing ability by then).

Chapter 2, checkpoint 2 (the black-and-white zone). In the heavy / block form, smash the three fragile statues cleanly - a wasted slam lifts you out of the area before you finish.

Chapter 1 (first stage of grief). At the very start, walk right until you regain free movement, then backtrack left to the collapsed statue and stand still - Gris falls and picks herself back up on her own, triggering it.

Chapter 2 (the wind / sandstorm section). Cross without ever being blown away - shelter inside the buildings (you're immune to the wind while inside them) and anchor with the heavy / block form. Don't get swept off once.

Chapter 5 (the gravity chapter), from around its third checkpoint once you can sing. Sing to all 7 magic fowls (the pink flamingo-like birds off to the sides of the path). Two register automatically when you gain singing; hunt the other five.

Collect all 28 mementos (glowing memory runes) across chapters 1-4 - the final chapter has none. They save the instant you touch them, so Chapter Select clean-up is painless.

Needs all 28 mementos first (Mementos). Then select the final chapter and go directly below Gris's start point to a hidden entrance in a broken wall on the left; go in and sing in front of the sign for the secret childhood cutscene. Do it last.