In DARK, the butterfly effect is heavily incorporated into the structure of the game. As you progress into the story, the different choices you make can unknowingly affect the outcome of your story. However, some choices will prompt the player 1 of 6 different colored butterflies on the top right of your screen that can give a precognition of what may happen in the game's narrative.
Depending on the color of the butterfly, it will represent the precognition for the colors' corresponding character:
There are four different types of precognitions that can appear from a butterfly: