Thought this was rather cool. Went to Walmart to get Halo 3 since they dropped the price but they were out so I got Eternal Sonata instead, as well as Saint's Row off the discount rack.

So I get home, pop them into the 360 and check out the achievments. There are only 22 of them in Eternal Sonata, and they are all Secret ones! No clues or nothing. While it sucks because you don't know what you have to do to unlock them, it's kind of cool because it makes it more suprising when you get one.