This walkthrough will guide you through the whole game. Visit this page whenever you get stuck and feel like you need some help.

• First Floor, Bottom Right Hallway Classroom: Handkerchief item.
• First Floor, Top Right Hallway Storage: Flashlight item.

Head on to the second floor;

• Left Hallway Cafeteria: Nurse Key.
• Left Hallway Kitchen: Knife item.
• On the first classroom of the right hallway, you'll find a blue scribbling on the wall. Use the handkerchief to reveal the value of 1x.
• Right Hallway Second Classroom: Locker Tag item.
  • This item will show you the code for a locker you'll find later on in the first floor.

Go back to the first floor;

• Unlock the Nurse Office, located on the bottom left hallway.
  • You'll find another blue scribbling on the walL Use the handkerchief to reveal the value of 2x.
    • By adding 1x and 2x together, you'll get the code for the safe located in the Principal's room on the second floor.
  • Use the fake book on the bookshelf and enter the secret door.
    • Close the jail cell door before proceeding with grabbing the Stick item!

Enter the code on the second floor's safe to get the Classroom Key for the locked classroom on the first floor.

• First Floor, Bottom Left Classroom: Music Key. 
• Go to the lockers room on the bottom left hallway.
  • Unlock the locker with the Locker Tag code to get the Fake Book item.
    • The code is 2567.

• The code is 2567.
• Unlock the Music Room, located beyond the door besides the staircase on the first floor.
  • Interact with the piano to see a hint. 
    • Go to the Basketball Court, located to the north outside the Music Room.
      • You'll find a safe and another hint in the room to the west.
        • The code is 6985.
      • Enter the code to get the Hammer item.

Head on to the third floor:

• Right Hallway Computer Lab: Batteries item.
• Push the sign blocking the door on the left hallway and enter the room.
  • Use the hammer to fully break the crack on the floor, then fall down to the room below.
    • At the top left of the room, interact with the painting to get the Courtyard Key, The courtyard is located beyond the basketball court.
      • After going through the courtyard, enter the leftmost classroom and use the knife on the bloody wallpaper to get the Storage Key. The Storage Room is located right in front of the Music Room.

The Basement;

• Solve the Sudoku to get the code.
  • The code is 831.
  • Enter the code to get the Office Key for the locked room on the third floor.
• Cut the rope with the knife. It will have an effect later on.

Leave the basement briefly;

• Go to the office on the third floor and interact with the weird corner of the rug to find the Library Key below. The Library is located on the bottom right hallway of the first floor.
  • Use the stick to obtain the Screwdriver in the Library.

Back into the basement;

• Use the screwdriver to open the lid and obtain a Rope and a Screw.
• Use the rope on the dark hole and go to the floor below.
• Enter the room on the top left. Use the Screw on the drawer to get a Coin.
• Interact with the bottom right's door. It's locked... but after you try stepping away, you'll get a new way to go inside the room.
  • Grab the Magnifying Glass.
  • Clean the chalkboard with the handkerchief to get a code.
• Head to the bottom room then head west to find an item (The Jail Cell Key) on the floor. You wouldn't have gotten it otherwise without cutting the rope earlier on.

Head to the Computer Lab and use the magnifying glass on the whiteboard to see the button combination.

Use the coin on the Cafeteria's vending machine to get a Metal Piece.

• After you do the proper combination, a door will unlock.
  • Use the Jail Cell Key to open the cell.
• Enter through the destroyed hole on Mika's room to find a safe. Use the chalkboard code here to find another Metal Piece.

Interact with any of the metal pieces to form the Rooftop Key. 

On the rooftop;

• Use the stick on the leftmost room to grab the East Club Room Key, located on top of a shelf. You'll also find a painting around here.
  • The East Club Room is in the Basketball Court.
    • Obtain the Torn Paper item and use it on the colorful painting to reveal the button combination you'll need to open the final safe.
      • Grab the Entrance Key from the now unlocked safe and escape.