According to the devs, it's Resident Evil meets Prince of Persia, starring a keychain ninja plushie. Sounds nice! Looks nice too.
The people behind Nin are a new three-people studio called Vagabond Games, and this PC survival-adventure is their first title. Nin has been in development for three years, and it shows: the environments are fantastic, though it looks like the controls might take some time to get used to, with Resident Evil-like rotational movement and cinematic camera angles. Take a look for yourself:
The game will also have no HUD, meaning inventory and health will have to be tracked on the ninja plushie itself, with cut marks and dirt standing in for a health meter.
Vagabond is planning to release Nin in three separate parts -- the trailer above is for the first episode, which, according to them, will take at most 7 hours to complete. There's no release date, so if you're interested, you might wanna bookmark the project's Indie DB page.
Nin [Indie DB]