Here is the full list of all 38 Severed Steel trophies - there are 12 bronze, 23 silver, 2 gold and 1 platinum.
GOT ALL TROPHIES
GOT 50 HEADSHOTS
GOT 100 KILLS
FINISHED CHAPTER 1
FINISHED CHAPTER 2
FINISHED CHAPTER 3
FINISHED CHAPTER 4
FINISHED CHAPTER 5
FINISHED CHAPTER 6
FIREFIGHT LEVEL 10
FIREFIGHT LEVEL 20
FIREFIGHT LEVEL 30
FIREFIGHT LEVEL 40
FIREFIGHT LEVEL 50
COMPLETE CYBERMEDICINE CAMPAIGN LEVEL WITH AN ARM CANNON EQUIPPED.
BEAT THE CAFETERIA CAMPAIGN LEVEL IN NEW GAME + MODE WITH THE WARRIOR MONK MUTATOR
BEAT THE TRAIN STATION CAMPAIGN LEVEL DEFEATING EVERY ENEMY BEFORE BOARDING THE TRAIN.
BEAT THE CORRIDOR CAMPAIGN LEVEL WHILE EQUIPPED WITH THE GRAVITY ARM CANNON.
BEAT THE SERVER ROOM CAMPAIGN LEVEL WITH THE FLOOR IS LAVA MUTATOR
BEAT THE ARMORY CAMPAIGN LEVEL IN NEW GAME + MODE DEFEATING EVERY ENEMY BEFORE LEAVING THE LEVEL
BEAT THE ADMIN VENTS CAMPAIGN LEVEL WITHOUT ACTIVATING ANY OF THE FAN SWITCHES.
BEAT THE GREENS CAMPAIGN LEVEL WITH THE FLOOR IS LAVA MUTATOR
BEAT THE PARTY MANSION CAMPAIGN LEVEL IN NEW GAME + MODE DEFEATING EVERY ENEMY BEFORE LEAVING THE LEVEL
BEAT THE PORTAL LABS CAMPAIGN LEVEL WITH THE ONE IN THE CHAMBER MUTATOR
BEAT THE GARDENS CAMPAIGN LEVEL WITH THE WARRIOR MONK MUTATOR AND DEFEATING EVERY ENEMY
BEAT THE MUSEUM CAMPAIGN LEVEL WITH THE LIMITED SLOW-MO MUTATOR
COMPLETED A NEW GAME PLUS CAMPAIGN
FIREFIGHT LEVEL 60
FIREFIGHT LEVEL 70
FIREFIGHT LEVEL 80
BEAT THE MIDDLE ADMIN CAMPAIGN LEVEL WITHOUT USING THE STAIRS.
BEAT THE ESCAPISM CAMPAIGN LEVEL
DESTROY THE HEART WITHIN 60 SECONDS OF BRINGING ITS SHIELD DOWN.
KILL ALL ENEMIES IN PRODUCTION LAB BEFORE DESTROYING ANY OBJECTIVES.
COMPLETE THE LAB LEVELS IN CAMPAIGN MODE CHAPTER 1
COMPLETE THE CITY LEVEL IN CAMPAIGN MODE WITH META CANNON EQUIPPED.
GOT 1000 KILLS
GOT 200 HEADSHOTS