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