TCG is an abbreviation for "Trading Card Game", a slang term given for the game format often played in American and European countries as opposed to the OCG which stands for the Original Card Game from Japan.
Details
The TCG contains 12 DM booster packs. English sets ended at DM-12 Thrash of the Hybrid Megacreatures as the game was discontinued.
- See here: List of Duel Masters OCG Sets