Here is the full list of all 15 2Dark achievements.
You found all the pink candies in the game.
You have found all the lists of the backers of 2Dark.
You finished a level without saving.
You remained concealed in the dark for more than two minutes.
A boss was sliced up!
You scored over 10 points playing pool.
You finally fed that cat!
You finished the level without firing a single shot.
A boss was asphyxiated!
You smoked too much, that’s bad!
A boss has been poisoned!
You have taken over 10,000 steps in Gloomywood.
You saved all the children in a level in one go!
The circus lions took care of Antonio Petronelli for you.
You attacked one of the first enemies from behind and eliminated them.