Frequent updates to Fieldrunners [$2.99 / HD] over the past few years has kept the tower defense title feeling fresh despite its age, but its upcoming sequel looks like the kind of continuation we've been dying for. Dozens new towers, new skills, new maps, new modes and new enemies are all part of Fieldrunners 2, which is due out on iPhone later this June and iPad "shortly after" this initial release.
The original Fieldrunners was an excellent tower defense game that managed to stick out because of some really sharp twists. From what we've seen so far, Fieldrunners 2 is going to push that bar even further, and that's really exciting.
Here's some screens:
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