At the end of every year Amazon compiles a total sales data list for the best sellers in each major category on their site, which is the most popular online retailers the world over. What do we learn about 2018? That Super Smash Bros. Ultimate was not only the best selling game in 2018, it was the best selling item in the whole of the video game category.
The next closest video game was the PS4 version of Red Dead Redemption 2, all the way down at number 14.
Total sales data for December in the United States should be here in a couple of a weeks, with complete lifetime to date sales data world wide through December of Nintendo Switch, Super Smash Bros. Ultimate, and every other Nintendo published Switch title will arrive on January 31st.