Merge towers to defend your castle from waves of ruthless attackers. Your castle is under attack!!! Buy, merge and arrange your towers to defend against waves of bloodthirsty enemies. Give your towers super powers by adding ice, fire, lightning, poison runes and many more! Features: - 3 Difficulty settings. - 12 different types of runes. - Combine runes to make powerful synergies. - 25 unique towers. - Defeat waves of soldiers, archers, ninjas and even giants! - Focus fire by clicking on individuals enemies. - Move towers with ease. - Earn gold by defeating enemies. - No connection needed! Play offline or online. Quite possible the world's hardest mobile tower defense game.