Poptropica: Forgotten Islands is an iPad and iPhone game. It was released on September 5, 2013. It is a game of Poptropica which you can visit different islands and win different costumes.
||It will take you on a journey to discover the secrets of Poptropica’s buried past, one artifact at a time. Explore new islands, meet new characters, and take to the skies in a powered-up blimp that gains new abilities as you play! With each new island group, you'll uncover the hidden history of Poptropica's forgotten islands.
|—Poptropica Creator's Blog