Still in early access but it's only been out 5 days and is already approaching 2000 positive reviews. Will be back up to 13.99 in 2 days on steam.
Dead Cells is a rogue-lite, metroidvania action-platformer. You'll explore a sprawling, ever-changing castle... assuming you’re able to fight your way past its keepers in 2D souls-lite combat. No checkpoints. Kill, die, learn, repeat.steam link
OVERALL: Overwhelmingly Positive (1,722 reviews)
Release Date: 10 May, 2017
Edit: Rockpapershotgun has a first impression up with some pretty gifs:https://www.rockpapershotgun.com/2017/05/16/dead-cells-review-early-access/