Not only is ''VideoGame/YumeNikki'' a goldmine of NightmareFuel, it also has its share of pretty tragic moments, which [[WMG/YumeNikki may or may not represent tragedies in Madotsuki's real-world life]].
* [[spoiler:Madotsuki's [[DrivenToSuicide suicide]]]] at the end of ''VideoGame/YumeNikki''.
** It's even sadder if you check out some of the [[ fan works]].
** Then there's the [[ music in the credits...]]. Oh, and the [[ orchestral remix.]]
* The Toriningen Picnic, especially if you take into account that it's supposed to represent [[{{Hikikomori}} social exclusion.]] Just... try to stand there for any long length of time and say you don't start to feel lonely.
* Pretty much anything about Masada. You find him in a spaceship, all alone. There's a table with ''two'' chairs by his piano. He was clearly lonely. And when the spaceship crashes, he sounds so sad. It doesn't help that one of the theories implied that he died of overdose. Finally, he's the only character to react to Madotsuki pulling her knife out, by [[YouBastard slowly backing away from her out of fear]].
* The part on Mars, with the alien, the music is definitely melancholy and the creature appears to be crying. The whole scene just screams isolation.
* Arguably, a happy one as of ''Dream Diary''; [[spoiler:after so many years of Yume Nikki remaining unfinished, with the only ending being Madotsuki taking her own life, the full release ends with her finally exiting her room and seeing the sun.]]