Games like Memories of Replica
Madotsuki's Story: Retrograde
Madotsuki's Story: Retrograde is a sidescrolling platform fangame based on Yume Nikki. Alongside enemies and obstacles, there are Relics that can be collected, which can be used to unlock other stages.
SIght
SIght is a Japanese Yume Nikki fangame. You play as a cyclops named Nakime and the goal of the game is to obtain the five Items (アイテム) scattered throughout each world to unlock one of two endings.
Super Nasu Bros
Super Nasu Bros is a Super Mario Bros-inspired Yume Nikki fangame. You gain points by collecting eggplants and jumping on famicom demons.
Mild Dream
Mild Dream is an English Yume Nikki fangame made for Dream Diary Jam 2. One differing feature is that there are two different types of effects: Normal and Lucid. In order to use Lucid effects, the player must enter a state of lucidity by interacting with one of the various bees found within the dream world.
WeAreDreaming
WeAreDreaming is a Chinese Yume NIkki fangame. You play as Zakurotsuki (附石榴), who refuses to leave her room. Exploring the dream world can also unlock wallpapers, music and menu skins.
Conexus
Conexus is a short Yume Nikki fangame that follows a young adventurer who mysteriously awakes in a realm of interconnected worlds named the Conexus. Uncover the reason why you were brought to the Conexus, and learn about the realm's history along the way. Or if you don't feel like performing story errands, just treat it like a digital museum instead. This game features 17 unique areas to explore, with lots of weird things to see and people to meet everywhere you go. Unlike the typical Yume Nikki fangame, there aren't any "effects" to find here, instead all of the focus is placed on touring a fully open realm where every path leads to somewhere else.
Yume Petto
Yume Petto is a Petscop fangame in the style of Yume Nikki. Explore familiar places as well as new worlds of all kinds, and collect all of the effects. Every world, characters etc must be at least a bit related to the Petscop universe.
Yume Slide
Yume Slide is a non-traditional Yume Nikki fangame. It is a timed balancing game where players must tilt the platform to prevent Madotsuki from falling off.
Kyukkyu-kun Game
Kyukkyu-kun Game is a Yume Nikki-themed dodging game.
Coma
Coma is a non-traditional platform Yume Nikki fangame made by Cheesecake.