Best shooter I played in the last 10 years.
It's just like old school games like doom, hexen/heretic or quake, but more like a polished brutal doom.
It's a completely skill-based/score based game, and there are no cinematics or hand-holds. For that alone, I don't think that it will do well with today's gamers.
It's in important milestone in gaming history, and it's just like bloodborne, where the action-packed game and upgrades are the main things pushing the player forward. Also like bloodborne, the game rewards aggressive and precise offensive strategies.