Sesame Street: Once Upon a Monster

While browsing the library, Elmo returns to the street with several books, including one called Once Upon a Monster. Cookie Monster has fond memories of the book and they both enter it magically. Inside, they find that not everything is as great as Cookie remembered and help all the monsters in the story with their problems. The levels in the game are defined as chapters in the book.

Chapter One: "The Greatest Party There Ever Wasn't"

Cookie and Elmo discover Marco's birthday party, which cons...