Hard as it might be to believe, 2021 is already more than halfway over, and it seems that a surprising Nintendo Switch game is Europe's best-selling physical video game thus far: Super Mario 3D World + Bowser's Fury.

Released by Nintendo in February, the title packaged the 2013 Wii U game Super Mario 3D World alongside a new one called Bowser's Fury.

While Super Mario 3D World + Bowser's Fury is at least a recent port with a good deal of new content, Mario Kart 8 Deluxe has been available on Nintendo Switch for more than four years now, making its presence on the list even more surprising.

Some of these games have offered little in the way of additional content, but Super Mario 3D World + Bowser's Fury broke the mold.

It remains to be seen whether Super Mario 3D World + Bowser's Fury can hang on to its spot at the top, or if a new game will claim it?