Interesting stealth game
Aragami is a fun little stealth game. It doesn't really offer the usual alternative of going berserk whenever you're seen, so that makes it more challenging. It's akin to a puzzle solver in the sense that you have to create a mental image of enemy routes to progress, rather than react to them. The collectibles add to the story and challenge of the game.
With a prequel on the way, if you enjoy stealth, I can wholeheartedly recommend this!