Or as my boyfriend likes to call this game, "Sad Dad RPG." Nier is about a father who has a sick child, and wants to do everything he can to get rid of her incurable disease. I wish there was just one sad moment, I really, really do. The daughter gets kidnapped, and Nier takes off after watching one of his friends get turned to stone in a moment of self sacrifice. She gets fixed, but it's still a pretty sad part of the game. Again, this game follows the Cavia school of anyone who can die, probably will. One of your other party members sacrifices his life in the last dungeon so that you can move forward, and the combination of the music, the kid sounding like he's 9, and the great voice acting just makes it unbearably harsh.
However, it gets worse. In the second playthrough you get a bit more backstory, and actually can understand what the enemies you've been killing (shades) are saying when they scream. Congratulations, you're a murderer.
Thanks again, Cavia.