to the rescue
Chaos Rings is good stuff. There is a fair degree of repetitiveness to it; there are four different "groups" that you play, and while they each have their own storyline and dialogue, the locales and bosses are the same, and their paths converge and stuff.
But the locales themselves are pretty gorgeous, it's pretty good as far as story goes, characters are awesome, and the gameplay is still fun. Music is fairly solid. It's not the best game out there, but it's easily one of the best and most polished iOS games I've played. Well worth $6.99
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You saved science, SuperNiceDog!
Call me numbers.