Let's see:

Hollow Knight

Bayonetta 1 + 2
Super Meat Boy
Shovel Knight: Treasure Trove
Mario Tennis Aces
Crash Bandicoot N. Sane Trilogy
Octopath Traveler
Mega Man X Legacy Collection
Final Fantasy XV: Pocket Edition

Intent to Buy:
Smash Ultimate
DK: Tropical Freeze

Huh, that's actually more than I thought. I definitely regret some of those purchases (*looks at Crash*), but I played some gems like Celeste and Mario Tennis Aces and the year will end on a high note with Smash.