Although it depends on what kind of bag you’re looking for, places like Walmart, Amazon, and Gamestop all have a wide variety of Five Nights at Freddy’s backpacks. Due to the popularity of the game, I’d imagine most game shops would stop FNaF merchandise, so it’s always worth researching online or calling before you visit to see if they have any suitable backpacks in store. When it comes to specific shopping, I’d constantly scour the internet before heading into any shops to avoid disappointment. You don’t want to turn up and be disappointed!