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
2025-09-10
National Video Game Day Becomes a Full Week
Gaming has grown into a global phenomenon, so of course it earned its own special day! It first kicked off in the 1990s and was originally marked on July 8th, before officially moving to September 12th. To celebrate this year, we’re running a huge YUPLAY storewide promo! Everyone who places an order between 10.09 CET and 17.09 CET will be automatically entered — and at the end, 21 lucky winners will receive a full refund of their order.
Gamescom 2025 has been a total hit this month, so we dedicate our monthly recap rubric completely to it and the highlights we would like to present from it! Get ready for a grand total of 12 exciting news pieces around the latest hit titles, media as well as hardware and in general what you should be looking around for in the coming months and much more. From Borderlands 4 to Black Ops 7, from Little Nightmares III to Ninja Garden 4, and even some NVIDIA news…