Sorry for the broken format, updating with the mobile. Will fix it later this month!
December 2017
1. Rocket League
2. Arcade Archives Vs. Super Mario Bros.
3. Minecraft: Nintendo Switch Edition
4. Stardew Valley
5. Mario Kart 8 Deluxe
6. Overcooked: Special Edition
7. Enter the Gungeon
8. Super Mario Odyssey
9. Mario + Rabbids Kingdom Battle
10. Xenoblade Chronicles 2
11. SteamWorld Dig 2
12. FIFA 18
13. Human: Fall Flat
14. 1-2 Switch
15. Brawlout
http://nintendoeverything.com/europes-top-15-downloads-on-the-switch-eshop-for-december-2017/