What made the game appealing to me was the sense of atmosphere and deep sense of immersion, it did not feel gamified but rather more simulated in this case respecting the ruleset of its own homebrewed world.
With the excessive use of mocap and talented VA's it of course heightened the sense of humanity in the game so made it that much easier to immerse, not being spoonfed also further weighted it for my brain to just dive in.
Maybe just a lot of people feel it resonated with them for same reasons?
