You need to use the matchsticks on the telephone to verify Ron's alibi.


Complete the case.

You get this by reading all the books in the library.


You need to click/read the books

• on each of the shelves (at least 7 times each) on each floor exluding the topmost.
  
• in the unsorted pile of books (3-4 books there) on the top floor
  
• piled up on tables
  
• in each row (A-Z) in the horror shelf multiple times until they repeat
  
• that's glowing on the pedestal, once you open the shelf via the lever
  
• on the opened shelf, right of the glowing book.
  
• near the skull (5-7)
  
• you get as inventory (They begin with L & T)

Important! You need to read the books in the DIY section twice. Once when Gail is present, and once when she's not. Also, the pile of books on the librarian's table can be read only when she's gone to the kid's section.

Complete the case.

You need to listen to all the three jokes the toilet makes. Reinitiate conversation with it thrice to trigger this.

Is it a bird? Is it a plane? Nah, it's probably a dragon! Once you come outside in the Darkside, you'll notice something flying in the purple background (Sky) near the disguise shop. Click on the creature to unlock the achievement.

You need to complete the virus puzzle in three moves. In the base state, tap bottom-right > top-center > bottom-left to complete it in three moves.

Complete the case.

Listen to all of Brickman's radio shows. There are 4 different shows he presents at various stages during the case. Check the radio in the beginning for the weather broadcast before you leave the room. Make sure to check the office once in a while and tap on the radio. After stunning each Gremlin, check your office. Note: Soon after Dooley breaks the urn, check the radio. That's the last show he airs.

Use the laxatives in the coffee and give it to McKing.


Complete the case.

During the course of the case, Davon's dad, being a helicopter parent, will call 5 times to check on him. You need to pick all 5 of them. Be sure to check back at the main cabin once you perform a milestone (getting an important item).

You need to enter the cursed cabin in the dark woods. A red window appears in the dark woods once you dismiss Larry & Barry by giving them the big foot picture and attend the call from the cabin immediately after (thanks @pcfreakshow).

Complete the case.

This one was very difficult to figure out. You need to use the hammer that you obtain from the construction workers on ALL things before you use it on the sewer gate. This includes the ladder, yourself, on the water, on the 'Move right'/'Move left' indicators, etc. Basically anything that pops up with a white label.

Complete the case.

Take a picture from the Photobooth.


Talk to Agnes in the food court.


Play the pacman-ish game in the Arcade.


While in the vent and before you find the left boot, you need to explore all of its nooks and crannies.

There are 4 special things found in dead-ends and you need to interact with them (Letters indicate where to go from the entrance of the vent. R-Right, U-Up, D-Down, L-Left).

• Teddy bear (D-R-R)
  
• Glowing rat (R-U-L)
  
• Tentacle (R-R-R)
  
• Tiny houses (R-R-U-R-R-D-D-R)

Complete the case.

You need to inspect 10 bins. This include the dustbins at the office, the tin bin in front of the antique shop, the bin on the train platform, etc. Not that hard to miss if you inspect everything you come across ;)

Inspect 8 cars. Make sure you inspect your car in each case when it begins. There's two more in Case 4 in the garage and one more (the black one) in Case 6.

Occassionally, while inspecting bins (like the tin bin in front of the antique shop) and other unusual places, you'll find a magazine. There's one in each case. Read all to unlock this one.

Locations:

• Case 1: 'Jugs Weekly', in the study's magazine stack.
  
• Case 2: 'Guylight', but you need to inspect the calendar.
  
• Case 3: 'News', On the newspaper stand in front of the disguise shop.
  
• Case 4: 'Late fees', that's being carried by the construction worker. A blue book.
  
• Case 5: 'Crime solving for boys', Under the top right bunker's pillow in the dorm.
  
• Case 6: 'Deepclean', In the tin bin in front of the antique shop.

Be patient and watch the whole of the credits :)