1. Super Smash Bros (NSW)
2. Mega Man X Legacy Collection (NSW)
3. Metroid Prime 4 (NSW)
4. Okami (NSW)
5. Steins;Gate Elite (NSW)
Honorable Mentions:
Mega Man 11 (NSW)
Catherine Full Body (PS4)
Valkyria Chronicles (NSW)
The World Ends With You (NSW)
Metro Exodus (PC)
To the two people that care, I've decided to omit the Persona Dancing games from my list, as I preordered the Japanese version, which comes out this month.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."