Debris

Overview
Debris (also occasionally known as Debris Dream) is a game made by someone known as Hedgehog / Harinezumi (ハリネズミ) (Pixiv). It involves an idiot (according to his description in the game's menu), Tatsuki (たつき)  going to the dream world by sleeping. There is an extra playable portion as an unlockable character in the post-game. It also seems to have glass and glitch motifs, possibly relating to the title  of "Debris": scattered remains of trash or wreckage.

Gameplay
Like most Yume Nikki fangames, Tatsuki refuses to leave his room, but has a balcony and video game console with a game called Yoke. Tatsuki saves in what appears to be a diary or journal, and enters the dream world by sleeping in his bed.

Even though Debris stays true to the nature of Yume Nikki Fangames, it adds a few new things such as having locked doors in the nexus, and is known for its many events and attention to detail.

Plot
Debris starts out like most fangames, but focuses heavily on events and the environment to explain Tatsuki and his possible  personality/past. After collecting all the effects, there is an extra playable portion as Lefia for the other two endings. Debris can end in four ways, only one being the "True END"

For how to get the endings, and more information about them, please see our walkthrough page for Debris (Warning: Spoilers for the endings of Debris)

Effects
For more information on effects and where to find them, please see our walkthrough (Warning: Spoilers for the endings of Debris) page for Debris.

Version 0.06 (Japanese)
Official Website

Pixiv Encyclopedia Page for Debris

Version 0.05x (Chinese)
Yumenikki.info Page