Here is the full list of all 31 DARK achievements.
Reached the ruins of Sanctuary
Earned ten experience rewards for completing areas without raising the alarm.
Made it through the club area at the Atlantis
Used Shadow Leap 50 times
Visited the Geoforge Parks
Distributed 20 Power points
Subdued 5 opponents and Fed on them
Completed a level without raising an alarm
Distributed 10 Power points
You met Blooming in the museum catacombs.
Found 7 PDAs
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 …
Talked to Samantha at Headquarters
Pursued Samantha.
Rescued Rose.
Rescued Tom.
Vampiric Powers used 50 times
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.