Achievement
"Winter is coming"
finish chapter 1
You start out training a couple men, and learning how to play and when finished you will move on to fighting Wildlings in a new area. Make your way through this fort until you find the Boss wildling (this will be right after an argument with your archer, you will then have to fight the boss in a 1vs1 battle alone shortly afterwards) after you defeat the boss, you will then be swarmed by more enemies until you lose all health. Once that cutscene ends the achievement will unlock.