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.

To activate the game, you need a Steam Account

• Login or register at the official
  Steam Website and download Steam client
• Install and start application, login with your Account name and Password
• Click the Games Menu.
• Choose Activate a Product on Steam...
• Follow the onscreen instructions to complete the process
• After the successful code verification, go to the "MY GAMES" tab and start downloading.