Here is the full list of all 27 Yomawari: Night Alone achievements.
Played a total of 50 hours
Stayed home for a total of 15 minutes
Made an offering to Jizo Statues a total of 50 times
Collected all items
Collected all collectable items for your room
Picked up the Big Bell
Completed the radio
Completed the puzzle
Found the Tsuchinoko
Kidnapped by Mr. Yomawari
Collected all usable items
Talked to Sis a total of 12 times
Cleared Chapter 7
Fed a cat
Opened Garbage Bags a total of 20 times
Kicked the can a total of 50 times
Cleared Chapter 6
Hid a total of 50 times
Cleared Chapter 5
Cleared Chapter 4
Picked up a trophy
Suffered a Game Over a total of 30 times
Cleared Chapter 3
Played a total of 10 minutes without the flashlight on
Cleared Chapter 2
Cleared Chapter 1
Cleared the opening