The game’s depth lies in the "Challenge" mechanic, where you use matching asset cards or "Wild" cards (representing high-value security or gold/silver assets) to attempt to take over an opponent's top stack. The defender can counter with their own matching cards, and the last person to play a card wins the entire set, moving it to the top of their pile. Crucially, your bottom-most asset stack is always "safe" and cannot be stolen, encouraging players to strategically layer their assets to protect their most valuable holdings. The round concludes once the deck is empty and all cards are played, at which point players tally their totals to see who is closest to the million-dollar victory.