This is the digital equivalent of a Nintendo Switch cartridge. It tells us Leo is looking for the official eShop version of the game, likely to ensure he has the smoothest, most "official" experience possible.
The "usefulness" of this story comes from the . Leo knows that while the file name looks perfect, he has to be careful. In his world, a file ending in .rar that claims to be a game could be a "mimic"—a virus disguised as a toy. HOT WHEELS UNLEASHED (NSP)(eShop).rar
He runs a virus scan to make sure there are no "tacks on the track." This is the digital equivalent of a Nintendo