Slug Advance: Metal

You must finish a mission without dying after collecting a card to keep it. The "Paper Thin" Card

When active, your character (Walter or Tyra) will die in a single hit . Metal Slug Advance

In Mission 3, you can find it by shooting the corner of a specific block in the first secret cave area. You must finish a mission without dying after

While some are just for display, many cards grant gameplay bonuses like increased weapon power, new "Slug" modifications (like the Slug Gunner ), and access to hidden map routes. Metal Slug Advance

Obtaining this card is necessary if you want to unlock the Decoration card .

There is a specific card titled (Card #004) that changes the fundamental gameplay.