Yeah, it's a card game. It's a blast. It's not too bad of a cash cow if you buy your stuff off of Ebay(except single cards, those get expensive...I refuse to pay $25 for a Crim card, or Mimiru or Nuke Usagimaru, for that matter...). At the least, I recommend picking up a couple of starters for cheap on Ebay(14.99 or so for two of them on Ebay) and giving the game a shot. It's really fun, especially when you get more cards and can make all kinds of crazy strategies and decks.
It's not like the video games, considering it's a card game. The object is to score 7 points, and you score points by winning fights(this can also be accomplished in many other sneaky ways). Both players have monsters and PCs and your monsters can attack your opponent's PCs and vice versa. When you win a fight, you can score a monster. It's a simple game, but a lot of fun.
For more information, check out the site at
www.dothackenemy.com.