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