In 2011 , Markus `` Notch '' Persson , creator of the sandbox indie game Minecraft , added a new hostile mob to the game , which he named the `` Enderman '' when multiple users on Reddit and Google + commented on the similarity to the Slender Man .
In 2011 , Markus `` Notch '' Persson , creator of the sandbox indie game Minecraft , added a new character to the game .