Turn based, 1 v 1, strategy game like Duel Monsters (Yugioh) & Magic The Gathering. Of course, it is no where near as complex as those games nor does it have fancy graphics. You can play it offline or online. It has cards like regular (attack) & special (magic).

Learning to play it is pretty straightforward. The instructions are short. Version 16 fixes errors from previous versions and the interface looks less cluttered.