"Store exclusives" refers to products or items that are only available for purchase at a specific store or retailer. These items are unique and cannot be found in other stores or online platforms. Full definition
Yakuza 5 came to PS3 in Japan back in 2012, but it only became available as a PlayStation Store exclusive in the West in 2015; Sega reconsidered its decision not to localize the PS3 game following a fan campaign to bring it worldwide. (polygon.com)
Mr muh meme is ready confirmed they will keep doing store exclusives in one of the many interviews posted a couple of days ago. (gonintendo.com)
If it is true that more exclusives are on the way to Windows 10, then expect them to be Windows Store exclusives too. (segmentnext.com)