Very old 39 Clues fan here, grew up with the OG as they were released and played through the site games to get to Madrigal. Today I remembered that the cards had a game that you could play with them, and after some searching I was able to find that it was called Doublecross. The closest I got to finding an actual, attainable example of rules was from some kid's video on Youtube that he posted 10 years ago showing how you set up the game. Since the page for Doublecross here only links to a dead page, I was wondering if anyone still knew how to play this game. Thanks.