Mariana;

Narrative:

You're in the middle of the ocean, below you is the deepest trench on Earth.

Your character is compelled to travel deeper and deeper, coming into contact with strange creatures yet unrecorded by scientists. Eventually, familiarity of the ocean surrounding you leaves your mind. Strange formations begin to materialize in the distance and physics begins to warp.

To reach the true depths of the Earth is to uncover the unknown.

(image from https://mysteryoftheiniquity.com/2013/12/03/the-un... )

Gameplay:

The game is essentially an RPG with platforming elements.

Heavy on RPG elements in the beginning, as the physics of the game changes, more qualities from its platforming sub-classification will take hold.

They player fights with melee weapons at first but will learn magic the deeper they venture.

Progression is accompanied by an unobtrusive narrative that is revealed through patches of audio and collections of texts scattered about.