The following are free:
2 days left
Spider heroes parkour: https://www.microsoft.com/en-us/p/spider-heroes-parkour/9nsb6664k680?cid=msft_web_chart&activetab=pivot:overviewtab
Rope Championship - The Tug of War: https://www.microsoft.com/en-us/p/rope-championship-the-tug-of-war/9n7kmthq939t?cid=msft_web_chart&activetab=pivot:overviewtab
Princesses and Pets: https://www.microsoft.com/en-us/p/princesses-and-pets/9p61qb8h3mr9?cid=msft_web_chart&activetab=pivot:overviewtab
Stylish Princess Fashion: https://www.microsoft.com/en-us/p/stylish-princess-fashion/9p6pxfncd595?cid=msft_web_chart&activetab=pivot:overviewtab
8 days left
Dark Chess+: https://www.microsoft.com/en-us/p/dark-chess/9p8vzz73vz94?cid=msft_web_chart&activetab=pivot:overviewtab
15 days left
Aeroplane Chess 3d: https://www.microsoft.com/en-us/p/aeroplane-chess-3d/9nrnwlzvvn9r?cid=msft_web_chart&wa=wsignin1.0&lc=1033&activetab=pivot:overviewtab
Note: The following times are approximately accurate at time of writing. The post will not be constantly updated so you may miss the deals.