I'm barely into it, but it's really good so far. In both Pyre and Hades, Supergiant is trying to weave defeat into the narrative, and it's really interesting to see their approach.
Hades is a "rogue-like" game. It's an isometric RPG like Diablo. You play Zagreus, Prince of the Underworld, son of Hades, as he attempts to escape to Mount Olympus. The basic game-play is you moving from room to room in a randomly-generated map. In each room you kill the monsters and get a reward. You keep going until you die.
When you die, you go back to Hades' palace where you pet Cerberus, talk to various NPCs, uncover more of the story, and spend resources on improving your character for your next attempt. Dying is part of the story, as various NPCs will comment on your last attempt. I got mocked for stepping in a spike trap.
Some resources exist only for the attempt, like gold and boons from the other Olympian gods. Other resources allow you to improve your character or unlock weapons or upgrade the underworld with new rooms. The gods' boons improves or alters one of your attacks, so each run plays slightly differently as you get boons from different gods.
That cycle of "attempt, death, conversation, improvement, repeat" is very well done. It makes dying become just part of the game. It also makes for nice stopping points for the individual play session.
There are multiple weapons. So far, I've unlocked a sword, a bow, and a shield. I'm not very good with the bow because it requires aiming, but I like the shield. It has a small knock-back which does extra damage if the enemy is slammed against a wall.
You also have a "Cast" ability which throws a projectile at an enemy. By default, the projectile debuffs the enemy and you can't use Cast again until you kill the enemy and pick up the projectile. It's an elegant way of allowing you a powerful ranged option, but keeping you from just kiting all the time.
So far, Hades is just superb. I'm playing on PC with a controller, but I hear that the Switch version is extremely well done.