CLASSIC DUEL LAB

Original cards.
One set of rules.

Play a local duel against a CPU with selectable difficulty using the new independent game engine. Includes all 28 official retail theme decks through Neo Destiny. Energy, attacks, Trainers, Powers, and choices are validated by the same authoritative reducer.

Levels 6–8 are experimental and may take longer to think. Expansion cards outside the included theme decks are still a preview and may have unsupported effects. This mode does not use the legacy browser rules.