iOS games don’t get a lot of play here, but my #1 iOS game of all time, far and away, is Kingdom Rush. I love Tower Defense games to begin with, but throw in the setting (fantasy) with some of the best “barks” in a game (“Say hello to my little friend!” “Yippe kai-yay mother-“BEEEEP!) and you’ve got quite the charming little game. Add on top of that some seriously challenging levels, and it turns into one of the best portable games available.
Here’s to hoping Frontiers is just as good.