Shiren the Wanderer: The Tower of Fortune and the Dice of Fate.
Last plat to wrap up the year, and boy is this one a doozy. One of the hardest, if not the hardest, RPGs on the Vita. A roguelike where the developers want to make the players suffer and really went out of their way to drive that point home.
You have enemies that spam status effects that incapacitate you, and they can do this as much as they want with no cooldown period whatsoever. There's enemies that can attack you with fixed damage that can go as high as 50 from anywhere on the map, in a game where having 200 HP is considered 'high' by the game's standard. There's enemies that innately act 2 times for every 1 of your own actions, often with high attack power to boot. That's not even mentioning the enemies that inflict permanent stat drops and can do nasty things to those lovely equips that you spent several hours building up to godly status. Nothing is safe.
Of course, there are ways to get around these powerful enemies, but that's assuming you managed to find that one item out of several hundred throughout your current expedition, and most new expeditions start with all items unidentified, so you'll need to waste some resources to even figure out if you have the proper items. A lot of the challenge in this one comes from the dungeons where you can't take a single item with you and have to use what you find in the dungeon itself to survive. Definitely recommend to people who like that thrill of conquering a challenge after dying over and over again, because that's what this game will do to you.