Here is the full list of all 31 DARK achievements.
Distributed 20 Power points
Subdued 5 opponents and Fed on them
Visited the Geoforge Parks
Found 7 PDAs
Vampiric Powers used 50 times
Used Shadow Leap 50 times
You met Blooming in the museum catacombs.
Distributed 10 Power points
Killed 50 unaware opponents
Killed 50 opponents
Completed the Tutorial
Died during the Tutorial … that IS bad.
You received your first blood – the first time is always something special …
Made it through the club area at the Atlantis
Reached the ruins of Sanctuary
Talked to Samantha at Headquarters
Pursued Samantha.
Rescued Rose.
Rescued Tom.
Earned ten experience rewards for completing areas without raising the alarm.
Completed a level without raising an alarm
Learned all the powers and their upgrades.
Finished DARK on “easy”.
Finished DARK on “normal”.
Finished DARK on “hard”.
Finished a challenge.
Finished a challenge in less than three minutes.
Finished a challenge without draining anyone.
Finished the Harding Museum in less than 20 minutes.
Experienced the game in Virtual Reality.
Found the (not all that) secret announcement for a future project in the Tutorial.