As you play, you'll be scavenging for supplies and trying to unlock new areas, like the infamous Vault. And, let me tell you, getting into the Vault is no easy feat - you'll need to figure out the secret code to get in. It's like, this huge puzzle that you'll be working on for hours, trying to crack the combination.
The game's core loop is all about exploration and survival. You'll be moving from train to train, avoiding danger and searching for clues. It's so satisfying when you finally find that one piece of gear you've been searching for, or when you stumble upon a hidden safe room that's just full of goodies.