: You must hold the card and interact with the grey keypad panel (often marked with "0000") near the exit.
: Once used, the panel's display changes from "0000" to "OPEN" in green. Essential Key Codes and Puzzles piggy key code
While most standard gameplay uses the "0000" card, players often search for "Piggy key codes" referring to secret numerical inputs for hidden endings or special skins. Piggy Wiki : You must hold the card and interact