I've never heard of it, but loss prevention is a big thing with Walmart with the volume of customers they have. That's how they've pretty much always been. There are stores here that use alarm boxes.
As for new games, the big retailers generally limit their selection to the big name games from EA, Activision, Ubisoft, Take-Two, WB, or the console makers. You'll find Final Fantasy XV pretty readily at Walmart, but Dragon Quest XI is a bit more iffy, and good luck finding a Walmart that will carry something like SNK 40th Anniversary Collection.
Game selection for big retailers may be a bit different here then. Cause a game like Dragon Quest shouldn't be missing at launch.
It also had Dragon Quest Builders 2, and Dragon Quest Heroes 2.
I didn't find SNK Collection, but since it's almost a year old, it may be out of stock. They did still have SNK Heroines though.
But anyway, if large retailers don't have a particular title, then someone that loves buying the games in person at a store would have to resort to buying them online I guess.