The UNO Show 'em No Mercy game expands the classic UNO experience with 56 additional cards, including intensified action cards like Skip Everyone, Wild Draw 6, and Wild Draw 10. A new Stacking Rule allows players to pass penalty cards (Draw +2, +4, +6, +10) to the next player until the final recipient must draw all accumulated cards. When a '7' or '0' card is played, players must swap hands with another player. The Mercy Rule eliminates any player holding 25 or more cards. The game comes in a portable, collectible travel tin, making it suitable for game nights, travel, or gatherings.