Now while this may seem pretty underwhelming, bare in mind there's also the presentation that factors into it. There's three main ways you can play the game: Pacifist, Genocide, and Neutral. Pacifist involves sparing everything and never gaining a single EXP for a very specific reason that's very important and don't ask me what it is, go play it yourself. Neutral is sparing and killing as you so choose which is one of the easiest to do, but probably no one's favorite. And then there's Genocide where you murder everyone and everything because our minds have been programmed by every other game ever to believe that monsters deserve death. To tell you the full truth, I've never finished a Genocide playthrough, because I just couldn't bring myself to kill all these characters I grew so attached to in my other playthroughs. I got pretty far in one but, in the end, I just couldn't do it. And that's probably one of my favorite parts of Undertale, because it's the first game in a long time that's made me feel bad for doing something. It's been so long since a game has made you really feel bad for doing anything, especially killing something. I mean, video games are the only thing that will literally give you points for killing multiple people in a row. Have you ever gotten a kill streak while watching a movie or reading a book? I suppose you could get a real life kill streak but that is called. But while Undertale will technically reward you with an interesting new story for murdering everybody, it will call you out on how much of a psycho you're being the whole time right up to the end where you have to do the most intense final boss battle ever with some of the best monologues in gaming history that make you feel like an asshole. And that is Undertale.