This game is /intentionally/ marketed as a generic arcade shooter, but will in fact take you through an emotional and psychological horror experience.
DO NOT play this game like you play any other arcade shooter, pay attention to the characters' mental state, the details in the environment around them, the dialogue, all that. This game will deliver a different message to everyone, depending on one's personal philosophy, what details one picks up and how one perceives the game's story.
Gameplay-wise, cover system is clunky and gunplay is too arcadey for my taste but it isn't worse enough to affect how you experience the game.
Very, very, very underrated. Hope there would be more similar games in the future.