Board Thread:General Discussion/@comment-32266658-20171213012727/@comment-33915032-20180106104329

Speaking in a general sense, the genocide ending is quite terrifying. You're the only thing left in the Underground, which had just been stripped of every last bit of life, causing the monster race to go extinct.

Some of the neutral endings are scary as well, and some are just plain tear-jerking and SAD. Like the leaderless ending, Sans describes that everyone feels like they are trapped alone, in the dark. Pretty scary,