Unbroken is a solo game of survival and revenge. You play as an unfortunate adventurer who was left for dead in monster-infested caverns. Your goal is to collect enough resources to defeat four progressively tougher monsters on your way to freedom and vengeance. If you are to succeed, you will need to gather every bit of your resolve and be smart with the resources found in these catacombs.

The game is played over the course of four levels. In each level, you begin with the Travel Phase, in which you collect resources and prepare yourself for the coming battle. Then you encounter the monster in the Combat Phase. Should you survive the battle, you progress to the next level. If you defeat the monster at Level IV, and manage to not starve to death — victory is yours! You have reclaimed your freedom and exacted your vengeance.