Cards

The Game

Clicking on the word "knife" unlocks a picture of the Joker threatening Gotham ADA Rachel Dawes with a knife.

Solution

There are 12 cards at the top and 26 cards at the bottom. The cards at the bottom each represent a letter of the alphabet, with the first being A and the last being Z. Using this alphabet, the cards at the top spell "unforgivable", the next passphrase.