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