It appears that this achievement is somewhat glitched in a positive way according to DaMikeSC , so when you place one of the collectibles the achievement will unlock, despite this, below are instructions of where to place the collectibles in the sleeping quarters. Along with the locations of which they appear in chronological order. Placement of the CollectiblesMask
can be placed on the coat hanger.Skull
is placed on the shelf on the left side of the room.Toy
can be placed on the right bunk bed.Crystal
can be placed on the desk on the right side of the room.
If you are unsure on where to find the collectibles, read this below.Where to find the Collectibles
For James's mask there are two possible scenarios
of obtaining it which is explained in the spoiler tags.James Mask Scenario 1
collectibles can be found inside the cave that you go to, you can get these while you're looking for a way to cross the stream of water. The Crystal
will be on the left side of the cave near the water and the Toy
is on the right side of the cave next to where AJ is standing.James Mask Scenario 2
is inside the fishing hut when you are playing as AJ, and it’s on your right side next to the broken cooker.
If you're still struggling feel free to use this as a reference.The Walking Dead: The Final Season - Episode 4 Collectibles
Hope this helped.