Here is the full list of all 16 Downward Spiral: Horus Station trophies - there are 15 bronze and 1 gold.
Completed Act 1
Completed Act 2
Completed Act 3
Completed Act 4
Completed Act 5
Completed Act 6
Completed Act 7
Grabbed every international item in Horus Station
Chose Explorer mode and completed an Act.
Survived an Act in Oppressive mode.
Completed Horus Station
Found one collectable in Horus Station
Found ten collectables in Horus Station
Found all collectables in Horus Station
Completed an Act in Co-Op
Played ten rounds of multiplayer in Horus Station