This is essentially what Nier is like, narratively:
 
"I have to save my daughter or she's going to die! Of a disease/curse! I'm not sure which yet!" (sad violin)
(moments later)
"Dude, isn't it weird how fetch quests are everywhere? Especially early on?" "I know rite?"
(moments later)
"MY WHOLE FAMILY WAS KILL BY DEMONS. AVENGE THEM WHILE I KILL MYSELF." (sad violin)
(moments later)
"Hey, that kid gave us the same sword as a reward again." "Oh you did not just break the 4th wall about this second playthrough you rapscallion hahaha!"
(moments later)
[Harrowing text description of little boy dying in a hospital as part of a puzzle]
(moments later)
"Hey man, text adventures are old and kind of suck, am I right?" "Yep."
(moments later)
[Equally harrowing account of Kaine getting killed by a giant monster and then getting possessed by someone who can only be kindly referred to as a fucking psychopath]
(moments later)
"Hey, the chick in the gothic lolita set-up is swearing again." "She's such a card, ho ho."
 
And it just goes on like that. I played Drakengard and was thoroughly uneasy throughout, so either Cavia are just geniuses at how to make games for serial killers to enjoy, or they're fucking around with my head for no discernible reason. If anything, Nier is making fun of the heaps of melodrama proffered by Drakengard's story about love, loss and omnivorous giant demon babies, and then in the next breath following its example with some of the darkest and weirdest storytelling told straight that I've seen this side of a survival horror.
 
Basically, if you like guilt/sadness porn (and provided Lost Odyssey isn't available), you'd do well to get Nier. And make sure you stick around for the second playthrough, where you find out all the bosses you're fated to murder horribly all have beautiful, touching backstories that rub in how much more lovable and peaceful they are compared to the main characters. 
Because Cavia hates you.