It all begins when Wendy decides to throw an end-of-year party at home with her friends. Before she gets a chance to ask her parents, her unbearable little sister Maureen steals her idea and asks their parents first. Unfortunately, the parents will allow only one party!

Maureen and Wendy start a series of crazy challenges to decide which one of them will host the party. With sister against sister, there is going to be trouble!

• Immerse yourself in a fun and delirious universe starring two sisters, who are never short of mischievous ideas!

• Explore the Sisters' city and complete quests and challenges in Adventure mode.

• Have fun with your family and friends in one of the four multiplayer modes:
  - Challenges: play the mini-game of your choice with friends!
  - Tournament: try to win the tournament by being the best in each round!
  - All or Nothing: play all the mini-games one by one!
  - Around the World: take turns choosing your favorite mini-game!

• There are 24 crazy mini-games, which come straight out of the Sisters’ imagination, such as unicorn toss, cupcake factory and extreme ping-pong.