.hack//ENEMY, also known as Dothack Enemy, was an English trading card game published in USA by Decipher, a trading card game publisher out of Norfolk Virginia, from 2003 till 2004. It was designed by Chuck Kallenbach and Mike Reynolds.
The distribution of the card game ran between 2003 to 2004 to coincide with the release of the .hack// main series titles such as .hack//SIGN, .hack//Infection, and .hack//LIMINALITY.
This TCG never received any localization outside of the USA and was not based on a Japanese trading card. Japan did have something entirely different released in February 2004 by the publisher Carddass Masters. These were known as .hack//SIGN Trading Card and The World Trading Card Game. They came bundled together in a booster pack style for 400 JPY each.