Abstract: A novel method of game play and registration of content that is in one embodiment in the form of trading cards. However, the method of game play may take other forms such as computer games, electronic games, networked games, and video games. The method of registration of content may be applied to other embodiments such as movies, video games, interactive entertainment, books, music, and art. In one version of the game a card's strengths and weaknesses and consequently effectiveness are modified by another Key Card's strengths and weaknesses. The goal of this game is to collect enough territory cards to become the winner of the game. Players may also verify the authenticity and register their card's (or other property's) unique non-serial identification sequence comprised of numerical, alphabetic, and character values and access further intellectual property.