Chop Sushi is a brand new game from our friends at THQ in the App Store that combines a love of the Japanese raw fish dish with an interesting twist on the kind of gem-matching battle gameplay that Puzzle Quest made famous (and addictive) a few years ago. It's still a matching game, except you're matching wasabi and rolls instead of gems and skulls, and instead of choosing one gem to switch another, you choose a piece and then swipe it to the end of a row or column, making a match anywhere on the board (as the rest of the pieces fill in for the one you moved). It's hard to explain, but easy to pick up, and tough to master -- the different movements make this one worth a look even if you've played Puzzle Quest or any of its spiritual successors 'till exhaustion.
Like other match-3 RPGs out there, there's both an adventure and a quick battle mode, as well as a challenge mode where you've got to match everything on the board together until it's all gone, so there's plenty of gameplay to go around. And the "slide" instead of "switch" mechanic keeps things fresh enough that you'll be looking for lots of new ways to make matches while playing. Chop Sushi is definitely worth a look -- it's in the App Store right now for $2.99.