Earn ten experience rewards for completing areas without raising the alarm.
Subdue and then Feed on 5 enemies.
Learn all the powers and their upgrades.
Use Vampiric Powers 50 times.
Continue playing to unlock this secret achievement.
Reach the destroyed Sanctuary in the destroyed apartment complex.
Use Shadow Leap 50 times
Distribute 20 Power points amongst the powers as desired.
Kill 50 enemies who were neither suspicious nor hostile.
Find and use 7 PDAs during play
Distribute 10 Power points amongst the powers as desired.
Meet Blooming in the museum catacombs.
Take out or Feed on 50 enemies.
Complete the tutorial.
Feed on an enemy.
Complete a level without tripping a single alarm.