Hey Folks,
Seems like a good thread topic would be to have a list of some of the best examples of indie Metroidvania games.
So post your favourites below.
First one that comes to mind is Hollow Knight.
I personally really love that game. The world is big and interesting, every time you get new skill its fun to see where you can get to. I also think the game prepares you well for some of the bosses. (Not to mention the art style and music)
Other one that have self enjoyed and played would be Salt and Sanctuary.
For me it is An Untitled Story. It has a big and content filled world, easy learn but hard to master gameplay and an interesting but non invasive plot. It is also very platformer heavy than action, which is a plus for me.
Fun fact: Its made by the same people who made Celeste and is free on their website!