cards and 4 function cards, and an eight-card booster pack. All starter packs contain the same selection of cards, while booster packs consist of random summoning cards. Booster packs and pre-constructed theme decks are available for purchase separately by Wizards of the Coast. There are approximately 100 unique card types in each set, with 110 in Set 1, a further 100 in Set 2 and 101 in Set 3 (although only 100 of the Set 3 cards are playable 'in game', with card 311 being a promotional card only. Two-player competitive matches can be played online. As a prohibitive measure against cheating the card draw, players' summoning decks are registered and saved by the game. In online matches, the random draw is handled virtually using the registered deck data. The cards are then played as normal. To prevent registering the same card multiple times as different copies, duplicate cards must be presented simultaneously when registering. In response to questions regarding possible counterfeiting of cards, marketing director Christy Newton stated that measures are incorporated in the recognition technology and in the printing of the cards to prevent color photocopies from being usable. Despite this, success has been reported using standard photocopies and hand-drawn copies Development When asked in an interview at E3 2006, Eye of Judgment producers Kazuhito Miyaki and Yusuke Watanabe answered that the game had been in development for three years; of which the previous year had been focused on graphics development, and the two years before that were spent developing the gameplay mechanics on paper. The developers elaborated that technological tests were conducted at the start of the development, and that one of the main areas of development was currently getting the game to properly recognize the cards on the play mat. Regarding the implementation of the CyberCode matrix code, Miyaki stated in a 2007 interview that working with the technology was challenging, noting that it started at Sony Computer Science Laboratories, featuring a more complicated barcode system where the initial implementation used "two supercomputers and high vision cameras", and wasn't practical for home game machines. According to Miyaki, "It had a whole mile to go, and to get from there to now has been very difficult." In August 2006, an official teaser site indicated that the name contained the subtitle, Conquerors of 9 Fields. The game has since been given a new subtitle, Biolith Rebellion, in Japan.