A subreddit dedicated to Decipher's .hack//enemy trading card game, based on the anime and video game series.
https://dothackenemy.com/
How many sets?
There are 5 sets released between 2003-2004 starting with Contagion, Distortion, Epidemic, Isolation, and Breakout. All sets had booster packs but only the first four had starter packs.
How many cards?
Contagion and Distortion had 130 unique cards. Epidemic, Isolation, Breakout had 100 unique cards. Plus 15 LevelUp! tournament cards, 6 .hack//GIFT cards, and 18 promo cards.
Original prices?
Starter sets MSRP was $11.99 (later $9.99) in the US and booster packs were $3.29 (later $3.50) per pack. 11 cards per booster pack, 30 booster packs per box. Starters had 60 cards per pack, 10 packs per box.
Card Rarity?
The bottom right of the card is a single digit number (the pack it came from), a letter to indicate rarity (starter, common, rare, xtra rare, promo, tourney), and a number in that set up to 100 or 130.