http://www.urban-rivals.comNow I *almost* didn't want to try this game, because the tutorial training woman is very... chesty.
But eh, I tried it. And it's fun.
Card-based battle game, pay $ to buy random boosters of more cards if you want, but you can also buy them from the marketplace with the points you get for playing. The game premise is that every character (card in your deck) is part of some gang, basically, and if you have several of the same gang in your deck you usually get a bonus for it. They also gain levels and experience. A deck has needs at least 8 cards, but only 4 are involved in each fight, randomly picked from your deck. Kind of Yu-Gi-Oh-ish.
Games are vs. live players, and always take about 3 minutes to finish, which is great when you have 3 minutes to kill.