Conjure
Finished episode two.

Just finish 2nd episode to get this achievement.

Devour
Found all four Seals.

Find 4 seals with Super Gear Boy:

• on Larry's kitches
  
• hole near room 501
  
• in room 502 (room with cage)
  
• Charley's old room (204)

The Addison Family
Got Addison to talk about his past.

You need at least 2 things to ask Mr. Addison in 2nd episode about tea:
1. See ghost in Miss Rosenbergs appartment and talk with her about all topics
2. Hear about missing girl from Todd
Then you can go back to Mr. Addison and you'll see new dialogue option: "About Addisons tea", ask about it and you'll get an achievement.

Unseen
Broke into 403 and talked with Sanderson's ghost.

After you will get crowbar break boards on door 403 and enter the room. Locate ghost with Super Gear Boy.

In Seeking Providence
Completed all chapters of the SGB game.

Complete all 8 chapters of game, last chance to do so - after finding chapter 7 in room behind the hole. Ghosts to unlock the chapters:

• Room 102, Miss Rosenberg
  
• Treehouse, near photo
  
• Todd's bathroom (story)
  
• Room 403
  
• Room 504, bedroom
  
• Room 504, behind the hole (story)
  
• Room 504, bathroom (story)
  
• One of the Seals (in Charley's room, I think)

The Box
Finished the puzzle box story.

Open box that you found in chect in Treehouse.

1. Take a piece of box in David's room (talk with him after you'll get a crowbar and choose 'Can I come in?' option, then pick up piece of box near right corner of the couch *doesn't have label so just press F or space*)
2. Finish Chapter 2 of Game Boy's game, notice 3 symbols, 1 in each room
3. Place those symbols on the box place them in backwards order starting from the side of box you see, when look at it 1st time (on long side - symbol with 3 squares, left and right ones connected; then on short side 4 squares in square shape; then on other long side banana-like symbol), press 'Open'
4. Talk to Larry about puzzle
5. Talk to Todd about puzzle

Best Buds
Had every optional conversation with Larry.

Just speak with Larry after every story progress, after you'll open the box and after you'll figure out what to do with content of the box.
Credits to Classcraic Games and kuzЯ