Super Deck! is a card game, in which players select a heroic and a villainous champion, and send the two to fight against their opponent's respective villian and hero.
Players first built up their deck (a minimum of 40 cards) and begin play with a 7-card hand. They place their selected hero on their left to begin their Hero stack and start their Villian stack on their right. The hero/villian cards have a base number on the top left, and each turn, players play one card (and replenish their hand) to modify the values of their or their opponent's stacks by multiplication, addition, or subtraction. Certain cards give effects that negate certain cards or discard an opponent's cards.
When the values of a player's hero and villian stack are both 10 points greater than their opposing stacks, he or she calls out "Last chance!" The game ends in victory for the player at this point if the opponent is unable to reduce the deficit by playing a card.