The Chronicles of Narnia: The Voyage of the Dawn Treader

You sail into Narnia through your mobile phone and explore the world's seas and islands. As King Caspian, Edmund, or Lucy, you'll encounter sea monsters and dragons in epic battles. Loosely based on the movie The Chronicles of Narnia: The Voyage of the Dawn Treader, the game also shares some sequences with the original book. The game is set as a journey to Aslan's country and then back to England. (wiki)