h2ohno on 23 June 2022
Some of mine have been mentioned already, so I'll go with Metroid Samus Returns for the 3DS. While it didn't sell great, it marked the start of what has become a renaissance for 3d Metroid after over a decade of nothing and reinvigorated the franchise which had been dormant for 7 years since Other M. It looks great in 3D and proved the 3DS wasn't dead yet even though the Switch had already launched.
