To get this achievement or trophy you must arrive at the end of
chapter 14. There you must go through the Nest without dying.
BEWARE - If you get killed you'll not be able to get the achievement.
I recomend you to save the game 2 times or load always the previous game or
update the game to the cloud or in a USB. If you die load the saved
game and you'll be able to continue as if you didn't die.