The Tower of Beatrice

This is the room 6/basement solution.

Follow it exactly for this achievement:

• Zoom into the bush on the right. You can take Yellow Leaves #1 and a Book #1 here.
• Zoom in to the white grid to the bottom right of the door. You can pick up Yellow Leaves #2.
• Move the white skull to the bottom right square. Move the moon to the right-most square on the second row. Move the mountains to the bottom left square.
• Before zooming out, make sure that the 'no entry' sign at the bottom left is red and not green.
• Zoom in on the circuit-looking display below the table on the left.
• If you activate the spike security systems, you'll see coloured paint on some of the spikes. You can see those colours below:
• These colours correspond with colours that you need to set up on the circuit-looking display (after the spikes have withdrawn). They should look like this:
• When you've done this, make sure the 'no entry' symbol is red, not green, before zooming out.
• Zoom into the top of the table, and take the Key, Book #7, Yellow Leaves #3, and Inkpot, and then zoom out.
• Zoom into the map high on the left wall. Take the Diagram and Yellow Leaves #4.
• Zoom into the pentagon of circles above the desk. Take the Yellow Leaves #5.
• Zoom into the top right shelf, and take Book #4.
• Put all of the books you currently have on the bottom shelf, and take the Blue Candle and Yellow Leaves #6.
• Use the inkpot on the top shelf, and then zoom out.
• Zoom back in, and take Inkpot Snail.
• Zoom into the display above the pentagon of circles, and take Yellow Leaves #7.
• You can interact with the diamonds. Interact with the top left, bottom left, and middle right diamonds to place three apples onto the picture. This will unlock lock #1.
• Zoom in on the table, and put the Diagram with the one already there. Then use the Inkpot Snail on the two pieces of the diagram. Also use the blue candle in the tower, and close the tower. This will make a light beam start.
• We now need to direct the light beam to be exactly as the bottom diagram on the door says. When you've zoomed in to each crystal and directed the light beam in the same direction as the diagram, you'll unlock lock #2.
• We now need to do the yellow lock. If we check the map, we need to follow the route that is the double red-line route. So, starting from the tower, it's Tower, Ship, Volcano, Mountains, Tree, House and then back to tower. Arrange the pictures on the yellow gem puzzle (middle right) to unlock lock #3.
• Zoom in on the purple gem puzzle (top right of the door). You want to put bullet holes in these plates, and the order you want is 1-4-2-7-3. This is to do with the number of the books of the head accessory of the creature. The reason why 4th plate is 7 is that the bear has no 'head accessory', i.e. antlers, and thus, it's blank, and the number of the bear book is 7. This will open lock #4.
• Without moving any of the light-beam crystals, zoom into the white grid at the bottom left of the door, and turn the 'no entry' symbol green, then activate all spikes. It will move the beam over the peppers and ripen one.
• Take the Green Pepper, Red Pepper, and Blue Gem.
• Disable the security spikes by turning the 'no entry' sign on the white grid red again, and then zoom into the pentagon of circles.
• Use the Blue Gem on the space on this display, and then zoom out.
• Place the red pepper at the foot of the light beam tower on top of the table.
• Place all seven yellow leaves and the key into your cauldron.
• Use your bottle on the cauldron to get the potion.
• Use the potion on the snail, and then take the glued diagram.
• Use the glued diagram on the map.
• Moved to the five pentagonal circles. The top left circle needs to be a tree. The top right circle needs to be a minus. The left-most circle needs to be a ~. The right-most circle needs to be a dot. The bottom circle needs to be a tree. This unlocks lock #5.
• We will now have to move the light-beams again. We need to get it to go from the skull on the bottom left, to the diagram middle right, up to the top right diagram, over to the green gem on the bookshelf, all the way across the room to the blue gem on the top left, down to the five circles, and then finally down onto the bottom image on the right door. This will unlock lock #6.
• We can now focus on the final lock. Zoom into the new image on the door.
• In order, from top to bottom, place the symbols: 'B', Clock, Portrait, Face, Door, Coffin.
• You can open the door, and in will come the villain. The door will shut behind him. He will have a health bar of 10 green hearts.
• Take the gold coin from the table with the skull. You'll get locked in a cage.
• Place the green pepper on the cage. To do this, you'll have to press it into the middle of the cage, and it'll appear at the top left. The snail will come along, nibble the pepper, and put acid on the cage bars.
• You can now poke out the cage bars on the bottom part of the cage. Activate the security system on the left under the table by turning the 'no entry' symbol to green.
• Enemy health: 9/10.
• He'll rebuild the cage. Poke out the single pole in front of the white grid, and use the pole to poke the 'no entry' symbol to make it green.
• Enemy health: 8/10.
• The cage disappears. The enemy will go through the mirror.
• Put the gold coin in your cauldron. Use your bottle on the cauldron for a potion. Use the potion on the pile of books.
• Exit through the basement door.

Achievement Unlocked:

Basement (Boss Fight continued)

• Interact with the chest.
• Enemy health: 7/10.
• When the enemy's hand comes out of the portal in the middle of the floor, zoom in, and use the pliers/boltcutters.
• Enemy health: 6/10.
• Zoom in on the finger-crushers. Use the left finger-crusher on the enemy's hand.
• Enemy health: 5/10.
• After he's said about the stone on his ring being removed, check the left finger crusher, and take the Gem.
• Rotate the shield so that the sword blade points to the top right.
• Zoom in behind the face patterns on the wall. Move the piece at the top left down one segment to the middle left. Move the castle to top left. Move the centre piece down to bottom middle. Move the top right piece to middle right.
• Zoom out, and put your potion bottle in the fish tank to get water.
• Zoom in on the puzzle on the floor with the pliers/boltcutters, and arrange the segments so that they create a full circuit.
• Pour the water into the circular segment on the floor.
• Zoom to the shelves on the right, and put the gem on the hook. Equip a single item from the following shelves, in this exact order: 2nd shelf from the top on the right. Top shelf on the left.
• Take the gem, go to the fishtank, attach it to the hook, and lower the hook. This will charge the fish. You will get an item from the fish.
• Use that item on the hook.
• Enemy health: 4/10.
• Interact with the bucket at the top right that you fixed with a potion earlier in the game.
• Enemy health: 3/10.
• When the enemy is behind the chest, interact with the chest. The smaller chest will jump up and bite the enemy.
• Enemy health: 2/10.
• Interact with the shield and rotate it around so that the sword blade points to the bottom right.
• When the enemy is moving away from the chest, from right to left, interact with the chest. He should bite the cloak. Now interact with the fish tank, and lower the object into the water again.
• Enemy health: 1/10.

Achievement Unlocked:

• You get Beatrice the book back. Click the door on the right to go back to room 6.
• You will see the enemy's hand come through the mirror portal. Interact with the portal to cut off his hand and part of his arm. Pick it up, and use it on the door.
• Leave.

Achievement Unlocked!

Achievement Walkthrough:
Room 1 - 1:00
Room 2 - 5:35
Room 3 - 16:25
Room 4 - 30:00
Room 5 - 41:20
Room 6 - 55:00
Boss/End - 1:07:25