Game completion time: 6-8h without guide IF you looking for achievements and collectibles for yourself and you might still miss some.
Achievement completion time with guide: 4-7h
Required Playthroughs: 2 or ~1,66. You can back up your save, but the recommended way to play through while collecting the INK collectibles only on Desert Level, do the bad ending, then replay Forest and Ocean to get the Inks for the good ending.

The truth
The pyramid is open.



At the main hub, once you collected 6 inks open the Pyramid.

Freedom
You have defeated the Mother. Freedom rained over your kin




Finish the game with at least 6 inks collected and with opened Pyramid.

Pyramid
You can now open the pyramid




As you need to find 6 inks for the Freedom ending, you will get Pyramid achievement too. This unlocks upon collecting the 6th ink. (there are 9 total)

Puppet
You have been used by Mother. The end of your adventure is here



Some picture suggests, you can't have more thank 3 Inks, but then what other endings you could get? So my guess is, you get this ending if you don't have at least 6 inks. I got this ending when collected only 3 Inks, the 3 from Desert.

The end
You have played both endings



Self explanatory. Unlock both ending.

The beginning
Start the adventure by helping the scarf



Wings
Unlock the double jump ability



Liana
Unlock the liana ability



Bonding
Bonding with the scarf.



Slingshot
Unlock the slingshot ability



Ocean
You have completed the Ocean



Glider
Unlock the glider ability



Desert
You have completed the Desert



Forest
You have completed the Forest



Home
You can now go home

There are 4 kind of collectibles on each level. You don't need to care about one, the Threads, that are related to the story, but collecting every other type unlocks 1 achievement for each type. You can find the collectible location on the level sections in this guide or on the linked video walkthrough with timestamps.

Drawings
You have found all the hidden drawings!



Inks
All the inks have been found.



Toys
You have discovered all the hidden toys!

Ocean Master
You have mastered the Ocean by discovering all its secrets



Get all collectibles on the ocean level.

Picture 1 collectible is right behind the entrance of the zone:

Ink 1 collectible is easily visible, to the right of your heading direction:

Toy 1 collectible is at the bottom of some trees, but you can return to this area later, as first your heading direction will be to dive deep into the ocean:

Toy 2 collectible is inside the ocean, the second time you go inside of it:

Toy 3 collectible is right after the 2nd Toy:

Picture 2 collectible is after passing a body of water by jumping through 3 small boats, but first you need to get the Liana Upgrade to get to the picture:

Ink 2 collectible is at the area where you picked up the orb which was required to dive into the ocean. Now with the liana upgrade you can access the area:

Picture 3 collectible is on the right side of the big door you need to enter nearly at the end of the level:

Ink 3 collectible is on the other side of the same area:

Desert Master
You have mastered the Desert by discovering all its secrets



Get all the collectibles on the Desert level.

Toy 1 collectible is to your forward-left from your starter position, at a small oasis:

Picture 1 is to your right once you arrived the big area where you need to collect some pages:

Toy 2 collectible is at the same area:

Toy 3 collectible is a bit more complicated, because once you collected all pages at previous area you can progress to 2 directions, so go left first while facing the main, middle door. After going through 2 big gates you will get the toy here:

Ink 1 collectible is after beating the wind puzzle for the first time, to your right:

Ink 2, Picture 2 and Toy 4 collectibles you will eventually get to an area again, where you need to collect some "pages" again. This area have 3 collectibles:
INK
PICTURE
TOY

Toy 5 collectible is now on the other side, starting from the first bigger area. After walking through a sunny and hot area your scarf will lose its color and you need to refill its energy. This collectible is at that location, while your scarf is still not refilled:

Friendship
You have interacted with the scarf so much! Now you are friends



At the same location keep interacting with your scarf until Friendship achievement unlocks. It is possible you will get the achievement later anyway:

Ink 3 collectible is after you reunited with your scarf and you need to fill the area again with water:

Picture 3 collectible is at the end of the area where you picked the previous 2 collectible, once passed the water body, on the other side:

Forest Master
You have mastered the Forest by discovering all its secrets



Ink 1 colelctible is a bit tricky, because you need to pass this region first to get a mask. Then return to here, make the bird leave and pick up the orb (blue circle) so you can move to the lever at yellow mark, then enter the red marked area:

Toy 1 and Picture 1 colelctibles in the room where you will meet the 3 character you "hunt" for:
PICTURE
TOY

Again, you can go to 2 different directions, go first to that one where 2 from 3 green humanoid went. Eventually you will get to a big area (you losing your scarf again) and you will be able to get Toy 2 collectible here:

Ink 2 collectible is at the same area, behind a door which is protected by some force field. To disable that, remove the vase from the button marked at the orange mark:

Like a child
Play with the wooden horse seesaw



At the same Area you will eventually enter a room full with toys. Toy 3 collectible is on the desk and use the green marked horse to get Like a Child achievement:

Picture 2 collectible is in the same area. You can go to this location once you made your scarf free, you need to feed the Scarf again here:

For Toy 4 collectible now you need to return to the area where you met all 3 green humanoid, after dealing with the 2 whose took away your Scarf. Now you want to enter toward that area where one green humanoid fled away. After going through the hold on wall, upstairs, turn to your left:

Bowling
Play a game of bowling



For Bowling achievement use the ball here(ball was at the green marked position):

Picture 5 collectible is at the area where you need to collect again some pages:

Goal!
Goal!!



For GOAL achievement you need to get the ball from blue marked area and make it go through the gate visible on this pic:

Ink 3 collectible is underwater, same area, as one page will be there, you will see a cave opening there:

Toy 5 collectible is at the same underwater region:

Timestamps available on YT too.

Timestamps ends with the colelctible or achievement itself at their respective chapter:

0:00 Intro
6:45 Ocean Drawing 1
7:52 Ocean Ink 1
10:55 Ocean Toy 1
14:15 Ocean Toy 2
15:50 Ocean Toy 3
16:30 Ocean Drawing 2
25:35 Ocean Ink 2
27:35 Ocean Drawing 3
29:03 Ocean Ink 3
30:30 Desert Toy 1
37:47 Desert Drawing 1
41:05 Desert Toy 2
45:50 Desert Toy 3
47:40 Desert Ink 1
50:05 Desert Ink 2
59:20 Desert Drawing 2
1:04:06 Desert Toy 4
1:06:40 Desert Toy 5
1:17:00 Desert Ink 3
1:19:00 Desert Drawing 3
1:20:26 Forest Ink 1
1:31:50 Forest Drawing 1 and Toy 1
1:35:30 Forest Toy 2
1:43:13 Forest Ink 2
1:46:10 Like a Child achievement and Forest Toy 3
1:46:55 Forest Drawing 2
1:50:39 Forest Toy 4
1:53:51 Bowling achievement
1:57:00 Forest Drawing 3
1:58:45 GOAL achievement
2:03:50 Forest Ink 3
2:05:56 Forest Toy 5
2:07:00 Forest Level End
2:16:04 Good Ending and The Truth achievement
2:20:38 Bad Ending (you need to have less than 5 inks)

Enjoyable games (no hentai(safe to browse at public or at workplace:-D) or effortless games, only games with possible and enjoyable gameplay) on an achievement hunter curator with perfection times, difficulty ratings, some helpful info about the games and linked guides/reviews/walkthrough videos:

https://store.steampowered.com/curator/30168383-Average-Achievement-Hunter/

You can also browse our lists, based on the completion time of the games posted on our curator.
If you extra thankful for the guide please follow the social media links on the curator too (twitter, YT):-D
Thanks