Despite no major retail releases for Switch, it continued to lead US system sales into the first month of the year.

The NPD Group's January survey, which covered December 31 - February 3, had the Switch as the best selling console hardware in the month, the largest January for console sales since 2013. (Note: Like 2018, January 2013 was a five-week period.) The 3DS also had their best January since the same 2013, though neither system had hardware figures released.

In the combined-revenue software chart, NBA 2K18 was the top ranking game with a Switch release, checking in at #6. Super Mario Odyssey, The Legend of Zelda: Breath of the Wild and Mario Kart 8 Deluxe slid in at 7 to 9, FIFA 18 was #15 in the chart and Splatoon 2 ran 18th for the month. Nintendo's sole new retail release for January, Kirby Battle Royale, was #10 in the 3DS software chart. For the last 12 months NBA 2K18 is the second best selling title, Breath of the Wild is 5th, Odyssey is 9th and Mario Kart 8 Deluxe 10th.

The software revenue rankings for Nintendo platforms:

Switch

1. Super Mario Odyssey
2. Mario Kart 8 Deluxe
3. The Legend of Zelda: Breath of the Wild
4. Splatoon 2
5. Pokken Tournament DX
6. The Elder Scrolls V: Skyrim (Bethesda)
7. Xenoblade Chronicles 2
8. ARMS
9. Mario + Rabbids: Kingdom Battle (Ubisoft)
10. DOOM (Bethesda)

3DS

1. Pokémon Ultra Sun
2. Pokémon Ultra Moon
3. Mario Kart 7
4. Mario Party: The Top 100
5. Minecraft (Microsoft)
6. Super Mario Maker
7. Super Smash Bros.
8. Mario and Luigi: Superstar Saga + Bowser's Minions
9. New Super Mario Bros. 2
10. Kirby: Battle Royale