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.
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.
News & Updates
2025-11-10
Get Double Amount of Extra Event YXP and Grow with YUPLAY
As previously promised, we are going to be making YXP events on the more regular side of things and here is the next opportunity for you to get a double amount of YXP from an Extra Event, which will help you grow to the next level tier by taking advantage of it properly! We have prepared a special promo event that is going to present you with the option to get 100 YXP instead of the usual 50 YXP…
Another month has passed and it is time to present our overview for some of the more intriguing news stories in gaming that happened during it! We have prepared interesting pieces about some of the more popular current and upcoming gaming titles like the new DLC of Kingdom Come: Deliverance II, and the Korean mythology-inspired open-world game Project TAL, as well as the shocking CS2 scandal and a dedicated part about the already concluded support for Windows 10.