Well, I was going to post some of my recommendations of hidden gems in
this thread, but that got locked as I was typing my reply, so I suppose I'll just copy/paste the bulk of what was going to be my reply over here instead since it's already all typed up, which was basically an explanation/recommendation for the game Doctor Lautrec & the Forgotten Knights:
-Doctor Lautrec & the Forgotten Knights: Interesting puzzle/adventure game by Konami. It's easy to mistake for just a rip-off of Professor Layton, but it plays completely differently. Basically, you start off with some riddle leading you to a place in Paris where there's an underground labyrinth. Once you figure out where the riddle is pointing to, you go to that location and find the entrance to the labyrinth in that area, marked by a fleur-de-lis insignia. Once down there, you pretty much alternate between sections where you have to stealthfully avoid guards' attention, sometimes requiring you to move blocks around, to reach the next room, and rooms where you have to solve puzzles (like finding the differences between two otherwise identical pictures, and stuff like that).
At the end of each labyrinth will be a long hallway followed by a room with a "Treasure Animatus", or Living Treasure. In these rooms, you basically fight treasure possessed by spirits with your own treasure that you've collected so far and whittle down its health until its critically low, allowing you to tame it and claim it for your own. It seems a bit daunting at first, but it basically uses a very simple elemental system that it constantly reminds you of (via a simple chart) when you tap one of your treasure's icons. Basically, think Pokemon, only with living treasures instead of animals.
Intermixed with that are cut-scenes that tell a fairly interesting story (I'm only on like Chapter 3 myself right now because I've been doing plenty of sidequests to up my treasure count, which play pretty much the same way as the main quests and are there mainly so that you can get more (and more powerful) treasure if you're not ready to tackle on the next main area, but a number of them also contain cut-scenes with some character development and such, like one I just did which has a scene which tells how the two main characters, Doctor Lautrec and his assistant Sophie, met) and plenty of French history as well (you travel via walking across streets on an overworld map of Paris. When doing this, the touch screen shows the name of the place you're currently at, & if you tap on that, it will give you a brief explanation of the place's history, which is good if you're curious about that type of thing and can be helpful for figuring out some of the riddles on where-to go next).
The basic gameplay does get repetitive after a bit (I believe I'm at around 9 hours of playtime now, because of all the sidequests I've done so far), but the story and characters have been surprisngly good/interesting enough to keep me. Definitely an interesting hidden them that I haven't heard people talk about much.