Undertale

[Suicune's Fire]

Well, there's a bit more to that than you realize.

Spoiler:

It is unconfirmed, but very likely, that Chara didn't fall, he/she (depending on how you see them, I will personally be using 'he'), but, rather, he jumped into the underground because he was abused and bullied by the other humans, so when he saw the chance, he poisoned himself in the hopes of killing two birds with one stone, break the monsters out of the underground and kill the entire human race, including himself, to make the world a better place. In essence, Chara can be seen as an anti-hero, wanting good, but going about it in a villainous way.

Ah, I see. I like that explanation. He's still creepy though.

Spoiler:

I figured that his hate for humanity was along the lines that he felt what humanity did to the monsters was unjust and horrible, so he tried to rectify it, potentially... I thought he actually went to the top of the mountain to commit suicide. But ended up falling through instead. But, like, who wouldn't know what was up there at the top of the mountain? I dunno, haha. I bet there are many theories surrounding this game... for many parts of it!