51 is quite a few games on a single cartridge. Though the games vary greatly in complexity and difficulty. Playing with a person, it didn't take too long to put in something more engaging like MarioKart. And in single player the AI either has an unfair advantage, is too much like a computer, or tries blatantly imitate a real person. The asking price is far more then a deck of cards, but doesn't include enough value to make it worthwhile.