**New Update Has Full Support For iPhone 5 4" Retina Display!**
Defend your city from a barrage of meteors and UFOs in this hectic action game. Upgrade your cities defences and equipment to repel the alien invaders for as long as possible.
既休閑又具有挑戰(zhàn)性的游戲是很多玩家喜歡的，下面小編就給大家整理一些ios休閑挑戰(zhàn)游戲，讓大家可以打發(fā)空閑的時間，快來下載吧！
