Here is the full list of all 28 Intruders: Hide and Seek (EU) trophies - there are 6 bronze, 17 silver, 4 gold and 1 platinum.
Get all the trophies.
Escape 3 times from an enemy.
Make Irene remind you about the mission once.
Complete the story.
Complete chapter 8.
Get all the collectibles.
Complete chapter 7.
Complete chapter 6.
Get all the documents.
Check out all the computer documents.
Complete chapter 5.
Escape from an enemy once.
Complete chapter 4.
Get half of the documents.
Complete chapter 3.
Walk about crouching 100 yards.
Use a duct.
Complete chapter 2.
Complete chapter 1.
Successfully complete the panic mini-game once.
Fail the panic mini-game once.
Get a document.
Get half of the collectibles.
Close 5 doors.
Get a collectible.
Close a door.
Use 5 hiding places.
Use a hiding place.