Yume Nikki
Yume Nikki (ゆめにっき, lit. Dream Diary) is an adventure game by pseudonymous Japanese developer Kikiyama. The player controls a girl named Madotsuki and explores her dreams. The initial version was released for free on Kikiyama's site in June 2004, with updates continuing until 2007. It received a cult following globally following an english fan translation, and it's visual style and horror elements have been cited as an influence by many other indie games." (~)
To me, Yume Nikki is one of the only artworks in any medium that feels the way mu bullshit feels.
Resources
Fandom: Yume Nikki Wiki
Uboachan (archive)
The Cutting Room Floor: Yume Nikki
Yume Nikki Fan Page
Madotsuki's Closet
Yume Nikki Multiplayer
Youtube
Youtube: Yume Nikki - Unused Graphics and Features