The first in the series, titled High Card - Volume 1 , introduces the main characters and the world where special "X-Playing Cards" grant superhuman powers to their holders.

In the context of the multimedia franchise , "High Card 1" typically refers to the first volume of its audio drama or specific character-themed products. High Card - Volume 1: "The Birth of a High Card"

: If two players have only a "High Card" hand, the individual card with the highest value (Ace being the highest) determines the winner. High Card: Poker Hand Ranking

The label "High Card 1" is also used for various "Pattern 1" merchandise items, such as:

: Often referred to as "High Card 1," the debut episode titled "One Shot" introduces Finn's entry into the world of card players. Poker Hand Ranking

: Featured characters include Finn Oldman, Chris Redgrave, Leo Constantine Pinochle, Wendy Sato, and Vijay Kumar Singh.