Japanese publisher NTT Resonant has released the wildly popular Flash title GemCraft for iOS. GemCraft series is one of the most popular tower defense games ever released on a mobile platform. The title combines RPG elements with engaging gameplay that spans 4 worlds and 32 levels, each with 7 gameplay modes to unlock. GemCraft for iOS has been updated with optimized graphics and an all new user interface, as well as a series of challenging new levels. Here is more info:
In GemCraft, an evil wizard has summoned hordes of monsters to run amok throughout unsuspecting villages, slaying the innocent, and razing buildings. Players come to their defense, wielding an ability to summon gems and towers which, when combined, hurl colorful bolts of magic down upon waves of minions. Gem abilities differ by level and quality of gems that players unlock: slowing or poisoning enemies, hitting multiple targets at once, enabling rapid fire, and more.