Mine has to be Dragon Quest: Rocket Slime, a DS spin off of the Dragon Quest series that sees you playing as a slime operating a tank and rescuing the people from your town. You run around the overworld, collecting items to use as ammunition and saving money to upgrade your tank. The art and music are just as great as you’d expect from the Dragon Quest series. It made fantastic use of the DS’s dual screens. It’s also written for a younger audience, so a lot of it is just really silly and fun! Try it out for sure, I’m so sad there’s no sequel :(
Favorite obscure game?
Panther for Commodore 64 - The music is awesome!
Rez for Dreamcast/PS2 - not everyone talks about this game but the audience is a lot larger now than it was back when it came out for the Dreamcast and PS2 now that Rez Infinite is available in almost every current platform including the PSVR2.
I would’ve also said Another World (aka Out of this World) for the PC and SNES. But this game is also not-too-obscure like Rez. There are articles about it & the creation, re-released in almost every platform including the PS Vita, spiritual successors, copycats, and so on.