Solatorobo: Red the Hunter, OneShot, and 7th Dragon 2020 are all pretty obscure games that I've played that I don't think many, especially here, have touched.
Solatorobo is an action RPG on the Nintendo DS developed by Cyberconnect2 (.hack//, Asura's Wrath, Jojo/Naruto fighting games). It is the second game in the Little Tail Bronx series, with the first being Tail Concerto. In the game, you play a dog person (called caninu in game) named Red Savarin who uses his mecha to help him do work taking odd jobs for a living. After strange dark creatures start attacking and causing trouble in various places around the world, a strange cat person (called Felineko in game) named Elh Melizee appears before Red and offers to grant him huge amounts of money in exchange for her help in finding 3 special items to help stop an impending disaster that these creatures are a sign of. He agrees to this, and thus starts their journey. While sounding extremely simple, the game's story gets progressively more complex as the game goes on and it spends loads of times developing the characters. Even random side characters that don't hold any major relevance get some focus to help them appear to be more like real people in this world. The game also does really well at worldbuilding, spending much time telling you about every little facet of the world of the game, from history to culture to the origins of the current existing species of the world, to even little things like what kind of music people listen to and what people do for fun in this world. Its incredible the amount of depth and detail the game has, and its rumored that 7 years were spent on worldbuilding alone during the development of the game. While I don't know if this is true, the effort put in does show, and the game does have three 200+ page artbooks worth of art and lore for the game, which is much bigger than most games. Gameplay wise the game is really easy and repetitive though. You just lift enemies up with your mecha and throw them, or you catch projectiles and throw them back at enemies. The game also has puzzles, but it solves all of them for you. Its basically just mashing A to lift and then b to throw over and over from beginning to end. The game's pull is its writing though, as that's where it shines.
OneShot is an RPGMaker game developed back in 2014 during a contest to make a game within a month. The result was an adventure game about a cat person? named Niko who wakes up in a strange and dying world where he decides that he must find his way back home. To help guide him through this dark land, he holds a lightbulb that hen found when he first woke up to help guide him in this dark place. What's interesting about the game is that in order to progress, you have to solve puzzles that can only be solved by looking outside of the game on your computer for answers to problems that are within the game, and the game directly interacts with your computer in some ways, such as referring to the God of its world as whatever you've named your computer. Its kind of cool. It also has really pretty music:
7th Dragon 2020 is a Japan-only JRPG on the PSP (but fan-translated into English) somewhat akin in style to the Etrian Odyssey series about a faction of the Japanese government that tries to save the world after dragons from another dimension appeared and started reeking havoc all over the world, so much so that the entire world had fallen apart. Now, being a part of the 7th unit for the Japanese government, its your job to stop them and reclaim land for humanity, going into and taking back territory from the dragons. However, whenever a powerful dragon claims a part of the land, the land becomes distorted and strange red flowers appear throughout, creating very strange scenery, such as floating buildings with flowers growing on them. You must traverse these landscapes, stop the dragons, and turn things back to normal. Gameplay holds many similarities to Etrian Odyssey, such as its customizability, where you have large amounts of control over what classes your characters are and when you use them, and at any point throughout the game you can create new characters to add to your party. In combat, you also use a lot of buffs and debuffs in order to gain an edge and win in battle. Its really fun.