this is the most popular iPhone games
DragonVale The game genre is Role-Playing. Raising dragon as a pet is adorable, and if lucky you can hatch the the rare dragon eggs.
Requirements: Compatible with iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (2nd generation), iPod touch (3rd generation), iPod touch (4th generation) and iPad. Requires iOS 4.1 or later.
Angry Birds This game also can play on Google Plus :)
Mouse Maze Help the mouse eat all the cheese before the cats get him!
Fruit Ninja Lite cut fruits like a ninja :D lol.
Smurfs' Village Based on the original cartoon and comic art, players begin the game with only a single mushroom house and a lone plowed plot of land. From there, things quickly progress, allowing players to build specialized houses, elaborate gardens with colorful crops, bridges to span running rivers, trodden paths, and more.
Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.0 or later