There is no game like it on the market, well, until tomorrow. As for popularity, no chance, the first one wasn't popular and the second one won't be. It's just not that kind of "100% safe and for everyone" game people like and which can sell millions and even like Remedy games, which I'm sure selling much better.
It's a linear and heavy story/character-driven adventure game about real life mental illness in the 9th century Island during Viking raids. The closer comparison in terms of gameplay would be modern God of War but with much less emphasis on combat, backtraking, huge world exploration and when you need to fight in Hellblade, you're mostly fighting one on one (the first game aslo had bosses, no one knows yet if the second one has them as well). There's no character progression in terms of levels, no abilities to unlock, no quets to find and complete, no loot, no crafting and there's no HUD in the game at all. Hellblade games are more about the experience, story and characters and much less about stuff majority of people like, hence why Assassin's Creed is still a thing 17 years later and a lot of similar games as well.
Try the first game to see if it's your thing or not.