Players who downloaded "All Cards" files often found themselves with multiples of limited cards, or cards that the AI never seemed to play correctly. The game’s internal logic prioritized certain cards over others, and having "All Cards" meant you could build the "Chaos Deck"—an archetype that was dominating the real-life meta at the time but was barely represented in the previous Power of Chaos games.
: Joey’s deck evolves with your wins. As his difficulty increases (from 1 to 9 stars), he switches to more potent decks, including Barrel Dragon , Fusion , and Ritual strategies. yu-gi-oh power of chaos joey the passion all cards
Unlike modern digital games where cards are earned through packs, Power of Chaos used a duel-grind system. Each victory against the AI (Joey, Mai Valentine, or Seto Kaiba as hidden bosses) awarded a single new card at random. However, the pool of "all cards" extended beyond the starting roster. Three powerful promotional cards— Red-Eyes Black Chick , Red-Eyes Black Metal Dragon , and Metalmorph —were exclusive to players who purchased the physical Joey starter deck (or used a save file from Kaiba the Revenge ). Without these, 100% completion was impossible. Players who downloaded "All Cards" files often found