Asylum Model (9)
1. Crow's Office - in the cabinet
2. Courtyard - statue/fountain (close-up)
3. Dayroom - up to the left, behind the TV (close-up)
4. Library - in the desk drawer
5. Isolation - under the bed
6. Duty Room - in the cabinet
7. Burned Room - hole in the wall
8. Burned Chapel - next to Klaudia (close-up)
9. Kreuz's Office - in the bag

Achievements gained:
Dark Floors - find 3 parts of the Asylum Model
Madhouse - complete the Asylum Model

Morphing Phantom (15)
1. Second Floor Corridor - trashcan
2. Basement Corridor - can
3. Storage - skull on the wall poster
4. Forest Hut - face on the wall/shutter
5. Asylum Roof - cable/snake
6. East Atrium - stool
7. Operating Room - left gurney
8. Showers - bloody sink
9. Garden - face on tree
10. Isolation - hand in toilet
11. Burned Entrance - broken lamp to the right
12. Burned Corridor - door/panel on the floor
13. West Corridor - flower
14. Sickroom - bedlamp
15. Ashley's Room - face in the mirror

Achievements gained:
Broken Memories - find 3 Phantom Objects
The Number 15 - find all 15 Phantom Objects

Hidden Clues (9)
1. Hall - under the stairs, above the word MNEMOSYNE
2. Machine Room - above the escape hatch
3. East Corridor - glass door
4. Greenhouse - window
5. Corridor - wall next to Zed's room
6. Art Room - cat painting
7. Archive - the right archive locker
8. Burned Generator - the big container
9. Secret Room - wall next to the closet

Achievements gained:
First Session - find 3 Hidden Clues
Session 9 - find all 9 Hidden Clues

I changed the layout slightly; from everything being covered by the spoiler-tags to only half the text. It now shows what room to look in while keeping the items/areas hidden and each line now has its own spoiler-tag.