This virtual version of the fantasy card battle game casts players as an up-and-coming star in the competitive dueling circuit, who has the ability to transport himself to the "Creature World" realm in which the game's monsters and magic dwell. In the "real" world, players will accept challenges to duel with other card battlers, abiding by various "house rules" that complicate victory. In the "Creature World," players explore and fight, action-RPG-style, from a top-down perspective. Duel Masters: Shadow of the Code contains representations of all the 600 cards available at the time of the game's release, including those of the "Base" set, as well as the "Evo-Crushinators of Doom," "Rampage of the Super Warriors," "Shadowclash of Blinding Night," "Survivors of the Megapocalypse," "Stomp-a-trons of Invincible Wrath," "Thundercharge of Ultra Destruction," and "Epic Dragons of Hyperchaos" expansion sets. Upon completing the game's main story mode, all cards become unlocked. Two Shadow of the Code players can battle head-to-head through a link cable connection.