Yasumeru is a Yume Nikki fangame. This game stars Yasashi, a boy living in a small house on a hill. The goal is to explore and collect effects. After waking up, you can see the time of day changes every time you sleep. It cycles from morning, to afternoon, to night, to dusk, then back to morning. There is also a small chance of rain when you wake up.
Void is a Chinese Yume Nikki fangame. You play as yukiko, a girl who can't/doesn't leave her bedroom. The objective is to explore the dream world and collect effects.
Usagi is an English Yume Nikki fangame. In this game, the player takes control over a girl named Umiko as she explores her dreams. Once in the dream world, Umiko can visit numerous surreal worlds, find effects that change her appearance (and give her new abilities) and collect Mementos, which are needed in order to complete the game. While exploring the dream world, the player is encouraged to interpret the different events, locations and NPCs he/she encounters to uncover Umikos backstory.
Uotamuosu is a Yume Nikki fangame. It stars three protagonists: Shiwasu, Bill and Takatsuki. Each one of them has his own locations and stories. You have to go through Shiwasu's scenario first, then Bill's and finally, Takatsuki's.
Unknown Exist is a traditional Japanese Yume Nikki fangame. It stars a girl named Kaede, who refuses to leave her room. The objective is exploration and collecting effects in order to achieve an ending.
Umbra is a Yume Nikki fangame. It stars Scott, a boy who gets trapped inside his home due to a storm. The main focus of the game is exploring his dream world.
Umbra is the first game to use talk sprites, as well as the first to make dialogue an important gameplay element. The gameplay is traditional where the player is collecting effects, but with more puzzles and having dialogue choices affect the game.
Soul Song is a Chinese Yume Nikki fangame. The game plays much like other fangames, with the player's objective being to explore Mukuro's dream world via sleeping in the bed.
Sity is a Japanese Yume Nikki fangame. The game stars Mutsuki, a boy who cannot leave his room. The goal is to collect 16 effects in the dream world to unlock the various endings. This game has many elements related to modern cities and earthquakes.
Sister's Dream, also known by its original name Art de Reve, is an English Yume Nikki fangame where you explore the deep dreams of a girl named Guretsuki.
Guretsuki is a typical 19 year-old hikikomori girl who doesn't want to leave her room. Throughout the dream world are various effects that'll allow you to trigger certain events, or make exploring your dreams a lot easier. Be careful while exploring, however, for the deeper you go, the darker your dreams get...
Sewage is a Chinese Yume Nikki fangame. You play a girl named Xuán Wō Zǐ. Like other fangames, the objective of the game is to explore the dream world and collect Items. Goods don't change the protagonist's form or do anything at all. Rather, they seem to be memories from the protagonist's past.
Rucidia's Dream is an English Yume Nikki fangame. You explore the dreams of the protagonist, Rucidia. The goal is to explore and collect all of the effects to access the ending.
Reverse Dream is a Japanese Yume Nikki fangame. The main goal of the game is to explore Guratsuki's dream worlds and collect effects (called Images (イメージ) in this game). Interestingly, each effect is based on a certain way of dying, with each effect having 死 (lit. Death) in its name.
Repentance is an English Yume Nikki fangame. You play as a girl named Latanie who refuses to leave her room, so she explores her own dreams instead. Like most fangames, the main objective is to explore the protagonist's dream world and collect effects.
Remedy is an English fangame made by Isasapiens. You play as Hareta, a girl stuck in her bedroom. In the protagonist's bedroom there are two medicine bottles, one of which she must use before sleeping. You will be taken to one of the two main dream worlds based on which medicine you took before sleeping. Remedy is a traditional fangame, with the goal being to explore and find effects.