This achievement is story related and will unlock automatically as you progress through chapter 6. Below are the steps to take in chapter 5 to get there. Bolded areas are names of places you go to. Carry out the bullet points there and then moved to the next bolded location.
School Entrance-Where you spawn, facing the hole in the ground, turn right and head through the archway and turn left leading to a dead end created by rubble.
Collectible 26/30 is flying around on a UFO here.
-Go down the hole.
-You need "Friendship Power" to move certain objects out of the way. Down here are some rocks which can be moved zero power. Use the slap button
to move rocks out of the way. Head down this corridor to find the Ultimate Supreme Leader's lab.
Ultimate Supreme Leader's LabExamine the book. (bottom left)Outside-
Collectible 27/30 is behind the swimming pool on the path leading towards the boiler room. You should see it flying around.
Kokichi's Dorm-Examine the box of documents.
(on the right)-Examine the collected evidence.
-Examine the Kub's Pad
-Talk to Maki.
Boiler Room / Backyard-Examine the writing on wall.
-Talk to K1-BO.
5th Floor-When you encounter Exisals on the way, hold
or
to dispatch them.
-
Collectible 28/30 is on the banister behind the stairs that lead up to the 5th floor.
-Enter the red door on this floor.
Ultimate ??? Lab-Examine the laptop.
-Examine the giant vault.
-Set vault B to Gemini
(Monokuma twins) and vault A to Horse.
-Examine the vault.
-Examine the laptop.
1st Floor-Slap your way through some rubble that require "2" power.
-Go through the geometric pattern door. (black and white pattern on the door)
Spiral Staircase-On your way up, keep your eye on the centre rings in the middle of the staircase.
Collectible 29/30 is on the 5th ring up.
Ultimate Astronaut's Lab-Examine the large hole.
-Examine the documents.
1st Floor-Cross the main entrance hall, taking out an Exisal, and slap some "3" rubble away.
-Go into the basement to find the library.
Library -Talk to Maki.
-Talk to Himiko.
-Examine the moving bookcase.
-Examine the hidden room
Secret Room-Examine the curtain.
-Examine the Monokuma head in the tank.
-Examine the Monopad.
-Examine the trash can.
-Examine half broken door.
-Talk to Himiko.
Library-Examine the hidden room.
Classroom C (2nd floor behind the "4" power objects)-Slap the stack of chairs away in the middle of the room.
-Examine the hologram display.
-Select "Unlock New Memory"
-Select "The Survivors"
-Select "Yes"
-Examine the locker.
1st Floor
Girl's Bathroom-Examine the utility closet.
Secret Passage-Follow the corridor and examine the door.
Hidden Room
-Examine Motherkuma.
Shrine of Judgement-Talk to K1-BO
-Examine the Monokuma statue
Following these steps in chapter 6 will unlock:-
.