How to Find All 23 Notes and Get Both Endings in Detention -

Last Updated on 13 November, 2025

This article provides a straightforward path to earning every achievement in Detention. We will walk you through all story-based achievements, missable actions, collectible locations, and the steps required for both of the game’s endings. This guide is based on not only our countless hours of gameplay, but also with the aid of the community guides.

Warning: This guide contains major spoilers for the entire game. So, we recommend playing through the game once on your own before using this guide for 100% completion.

Story-Based Achievements

You will earn three achievements simply by playing through Detention‘s main story. You cannot miss these as long as you complete the game.

Foreign land

You obtain this first story-based achievement when you complete the 1st chapter. It unlocks after Ray wakes up in front of an old command post while paper planes fall around her.

More than a teacher

You earn this second story achievement during Chapter 3. It unlocks after you go to the movie theater with Mr. Chang.

I am who I am

You receive this third and final story achievement at the beginning of the 4th chapter, right after Ray has a conversation with her soul.

Quick Fact: The game is set in the 1960s Taiwan, during The White Terror, a 38-year-long period of martial law. The game’s themes of silence, censorship, and state-sponsored fear are based directly on this real historical context.

Action-Specific Achievements

Two achievements require you to perform specific actions at certain points in the game.

Outstanding observer

To unlock this achievement, you must find more than 90% of all observation points. The method is very simple. As you play through the first three chapters, you should hover your mouse all over the screen in every room and new area. When your cursor passes over an observation point, it will change into an eye icon. Click your mouse every time you see this icon. If you remain thorough, you will unlock this achievement easily.

What made you think this would work?

You can get this achievement in Chapter 2. When you enter the teachers’ offices building, go into the first room. Inside, you will find a phone. Interact with the phone to pick it up. Once you are holding the receiver, dial either 110 or 119. This action will pop the achievement.

Heads-Up: The enemies, known as the “lingered” (魍魎), are not just random ghouls. They are allegories for the historical oppression of the era, the ghosts of those who were silenced, and manifestations of Ray’s personal guilt.

The Collector: All 23 Note and Clue Locations

This achievement requires you to find all 23 collectible notes and clues scattered throughout the game. This total does not include the two notes you find in Wei’s notebook at the very start. We have listed all 23 items below in the order you can find them.

Prologue

Note 1/23: At the beginning of the game, while playing as Wei, look on the student table directly behind him to find this note.
Note 2/23: Find this note on the 2nd floor (2F), located to the left of Wei’s classroom.
Note 3/23: This note is on the 1st floor (1F) near the principal’s office, close to the white daffodils.
Note 4/23: Find this note on the 1st floor (1F) to the right, on the bulletin board.

Chapter 1

Note 5/23: The game automatically gives you this note when you complete the prologue and wake up as Ray in the auditorium.
Note 6/23 (Clue #1): In the auditorium, go to the flag room. You will find this clue in the vent, behind the fan.
Note 7/23 (Clue #2): Look on the shrine located outside of the auditorium to find this item.
Note 8/23: Go to the 2nd floor (2F) and enter Wei’s classroom. This note is on the wall in the back of the room.
Note 9/23 (Clue #3): Find this clue on the 2nd floor (2F), in front of the health center.
Note 10/23: Enter the health center. This note rests on the desk inside.
Note 11/23 (Clue #4): On the 1st floor (1F), find the gambling room located behind Mr. Kao’s room. You must have 3 dice to obtain this note.
Note 12/23 (Clue #5): This clue is in Mr. Kao’s room, sitting on the stool. A side note: this clue only appears after you have acquired the dice/teeth note (Note #11).
Note 13/23 (Clue #6): You can get this clue in the 3rd floor (3F) classroom. You must use the blood you collected from Wei on the table. After you do this, place your notebook on the blood engravings.
Note 14/23: After you escape from the ghost in the counselor’s office, you will find this note on a table.
Note 15/23: Find this note inside the trash can in Ray’s room.

Chapter 2

Note 16/23 (Clue #7): As soon as Chapter 2 begins and you enter the school, head to the right. You will find this note near the altar, which also serves as a save point.
Note 17/23 (Clue #8): This note is on the same floor as the previous one. Head towards the left, and you will find it on a cart.

Chapter 3

Note 18/23: Find this note on the floor, located to the left of Ray’s parents’ room.
Note 19/23: This note appears on the dining table where Ray’s parents were eating. It will only appear after you complete the clock puzzle and have the meeting with Mr. Chang.
Note 20/23: This note is on the floor in Ray’s Father’s destroyed study. It only appears in the room after Ray returns from the movie theater scene with Mr. Chang.

Chapter 4

You can find the last three notes in the rooms on the upper floor of the school after all the cutscenes finish.

Note 21/23: Find this note on the desk after the secret book club meeting cutscene.
Note 22/23: After the book burning cutscene, go all the way to the left. You will find this note on a shrine.
Note 23/23: You will find this final note on a chair after the cutscene where old Wei plays the piano.

Quest Tip: While the game teaches you to use food offerings to distract enemies, this mechanic is only required to pass a specific obstacle one time. Don’t hoard them thinking you’ll need them for a final boss.

How to Get the Good Ending (“Back to school”)

This achievement unlocks when you get the game’s good ending. So, to do this, you must fulfill two important conditions.

First, you must collect the last three notes (#21, #22, and #23) from Chapter 4. Please review the “Collector” section to ensure you have them.

Second, you must answer all four questions from Ray’s soul correctly. As you progress, you will be asked a total of four questions. You must select the specific answers listed below.

Question #1: Choose the answer “Losing myself”.
Question #2: Choose the answer “to escape”.
Question #3: Choose the answer “Take hold of your destiny”.
Question #4: Choose the answer “Try to take them back”.

After you answer all four questions correctly and leave the roof, an item called the “yellowed paper plane” will be on the floor between the two sets of stairs. You must pick up this paper plane.

After this, go down the stairs and out the door to trigger a cutscene. You will then play as Wei after his imprisonment. Walk to the school and go up to Wei’s classroom. Wei will sit in his chair. The “Back to school” achievement will unlock after the end of the credits.

Survival Tip: Your primary survival tool is not a weapon, but your ability to hold your breath (Right-Click on PC). This makes you invisible to most lingered spirits, allowing them to pass by you harmlessly.

How to Get the Bad Ending (“Everyone loves you”)

This achievement unlocks when you get the game’s bad ending. Earning this ending is simpler than the good ending.

To get the bad ending, you just need to give the wrong answers to Ray’s soul. When you face the four questions, provide any answer other than the correct ones listed in the “Back to school” section. Giving even one wrong answer will lock you into this path.

Proceed with the game until you reach the part on the roof with old Wei smoking. Walk down the stairs. If you see Ray’s soul standing between the sets of stairs as you walk down, it confirms you have successfully triggered the bad ending.

Quick Reminder: The small, lit altars you find throughout the school are not just part of the scenery. Interacting with them is the only way to save your progress, so use them whenever you enter a new, safe area.

Conclusion

At length, Detention offers a powerful experience, and for completionists, achieving 100% is a rewarding challenge. By following this guide, you can navigate the game’s darkest corners, find every hidden note, and witness both possible outcomes of Ray’s story. You will find all the collectibles, perform the specific actions, and make the critical choices needed to unlock every achievement. So, thank you for using our guide, and good luck.

Pro Tip: In certain rooms, particularly those with heavy story significance, Ray’s movement will be automatically slowed to a walk or shuffle, and you cannot run. This is an intentional part of the game’s pacing, not a bug.

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How to Find All 23 Notes and Get Both Endings in Detention

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