Here is the full list of all 18 Dark Legion trophies - there are 4 bronze, 4 silver, 9 gold and 1 platinum.
All missions finished
Tutorial All items are completed
Through the first level
Through the second level
Through the third level
Through the fourth level
Through the fifth level
Enter all levels 10 times
Enter all levels 30 times
Enter all levels 50 times
Kill 100 monsters
Kill 500 monsters
Kill 1500 monsters
Kill 50 monsters with a Headshot
Kill 100 monsters with a Headshot
Kill 200 monsters with a Headshot
Finish all levels Once did not die
The number of deaths more than 10 times