Here is the full list of all 38 Styx: Shards of Darkness trophies - there are 18 bronze, 16 silver, 3 gold and 1 platinum.
Unlock all trophies
Give of yourself to the worship of Lyssril...
Being invisible in a chest and not being caught by an enemy on a search
Push 10 enemies over the edge
Kill 5 guards with acid traps
Kill all the enemies in a zone
Unlock all skills
Unlock Gold level for all Insignias in all missions
Drink 25 vials of amber
Get out alive from 10 red alerts
Create 50 clones
Craft 30 items
Finish Mission 9
Unlock Gold level for all Insignias in a mission
Finish a mission with the gold Insignia of Swiftness
Finish Mission 8
Remain invisible for a total of one minute
Teleport 20 times into a clone (with the skill)
Finish Mission 7
Pickpocket 10 enemies
Finish Mission 6
Be saved by a Life-saving Clone
Finish Mission 5
Unlock your first ultimate skill
Finish Mission 4
Collect 50 raw materials
Finish Mission 3
Dissolve 10 enemies (vial of acid)
Kill an enemy in his sleep
Finish Mission 2
Having hidden 50 times in a duct or a hideout
Finish Mission 1
Complete a level without using an amber power
Finish a level without taking damage
Finish a mission with the gold Insignia of Mercy
Finish a mission with the gold Insignia of the Shadow
Finish the introduction
Finish a mission with the gold Insignia of the Thief