1. Separate the cards by their types: Pickup Cards, Event Cards, Weapon Cards, and Backpack Cards.
2. Take all of the Pickup Cards and Event Cards, shuffle them together and form DECK A face down.
3. Take all of the Weapon and Backpack Cards, shuffle them together and draw 12 of them without revealing any to form a second deck, DECK B, face down. Take the remaining unused cards and shuffle them to form a third deck, the Supply Deck (C), face down. Set DECK C next to the Objective Cards.
4. Shuffle DECKS A and B together to form the Search Deck (24 cards).