If you like Yume Nikki, you might not like this as it can end up feeling convoluted and messy at times, but playing this on the YNOnline site is a chill time, as they have a map that makes exploring the insane amount of worlds a whole lot more user friendly.
Due to its gimmick of it being communally updated since 2007, it can give you the most stunning beautiful worlds, with the most serene music or the most eye-melting mess with the most ear-melting track for company.

Overall I think that it's great, just not for the same reasons as Yume Nikki, as the novelty of having hundreds of dream worlds made by a bunch of different people over the course of the last 15 years is enough to carry it alone.

Although yume nikki has stuck with me for what seems like will be my whole life. I'd rather play this than the former. Why? The creativity and general lack of direction feel more like a dream. Keep in mind, it is far less personal and lacks a story which you can sort of make out. Not for worse or better, but there are moments in which it tries to create unneeded "myths" about itself (as some games do to gain notoriety), creepy or not. FYI I'm a born hater. It's free, play it (there's an easier to play online version).

Yume 2kki is the modern equivalent of a spiritual pilgrimage writ LSD Dream Emulator.

It gives you space to think your thoughts, shows you the most gorgeous audio-visual imagery you will ever see in a video game, and just lets you wander.

I will always love this game more than I will have words to express my emotions because of the ways it allows you to create your own meaning in the setting. There are experiences I have had tucked away in the bowels of this game's deepest annals that have changed me as a being.

It takes work to wander.
But what you find is up to you.

In all seriousness, Yume 2kki is a grand grab-bag of a game with a slight barrier to entry. Some worlds are almost offendingly irritating - fucking Graveyard World, I never want to see you again - but if you put in the work, this game holds some really amazing details, as well as the best soundtrack I've found in any game, bar none.

This game is something I show to the people I feel closest with, because it feels like I'm showing a piece of myself to them.

I love it. I will always love it.

Certainement un de mes jeux préférés de tout les temps
C'est tout simplement une lettre d'amour à l'art, et l'art du jeu vidéo

J'ai toujours été fan du genre "RPGM Games" et 2kki représente tout ce qu'il y a de bon ET de mauvais dans le genre à LUI SEUL, c'est une oeuvre communautaire bien plus qu'un jeu, ou j'espère, grâce à mes efforts un jour, peut être même participer !

Tout simplement ce qu'il y'a de meilleurs.

Si je devais résumer en quelques lignes le jeu, je me contenterai de dire qu'il s'agit tout simplement d'un musée, gigantesque, ou l'on peut s'immerger et profiter des oeuvres des différents artistes qui ont participé à la création de ce tout.

Bien plus qu'un jeu, c'est un mouvement de foule d'une communauté entière qui vise à montrer leur amour du genre ! Se contenter de voir Yume 2kki comme une suite de Yume Nikki serait une grave erreur ! Car c'est en réalité la preuve de l'impact que Yume Nikki a pu avoir sur les gens, et sur le monde du jeu vidéo indépendant en général !

Que dire de plus que, c'est un 20/20 autant vis à vis du jeu, que de l'expérience communautaire qu'il représente

Et j'espère sincèrement pouvoir plus tard figurer parmis les noms des NOMBREUX participants !

i dont really know how to express my love for this game through a review, i've tried writing one at least six times now and i've never felt that i've been able to do it justice in any sort of way really

i think yume 2kki is best described as an experience, not a game. it's not really something you go into because you want to play something, since there aren't really any gameplay elements to speak of.. but regardless, yume 2kki is an experience that has touched me deeply throughout my time with it. for reference, i've played it through the yno browser port; sometimes with friends, sometimes alone.

my first experience with 2kki was venturing to the tomb of velleities, one of the deepest dreams in the game, alongside a buddy late at night. neither of us really had any idea what we were doing or where we were going, but after a few hours of getting lost in the bizarre and beautiful locations on the way we finally made it. it was around six or seven in the morning and we were both exhausted, but at the end of it all we found what we were looking for, just as the sun began to peek through my curtains and illuminate my room. this experience has stuck with me ever since, and i think it encapsulates how i feel about yume 2kki as a whole.

2kki is by no means a flawless experience. while the community-driven nature of the game has created many beautiful sights and dreams that couldn't be in any other medium, there's also countless dreams that can range from monotonous to migraine-inducing, though i wouldnt exactly call this a bad thing either ... though they dont personally compel me, these sorts of dreams still contribute a lot to the experience in my eyes. the size of the game also makes it difficult to play at times without a guide, which kinda defeats the purpose of something like this in my eyes.

i'm not sure if i can really "recommend" yume 2kki, at least in a certain sense of the word. like with most art, you're only gonna get as much out of it as you're willing to put in, so i doubt itll be very enjoyable if you dont really actually want to play it, so i don't think you should force it if its not something that immediately interests you. but i did! so thats cool i think. i like yume 2kki

A lovely and deeply-expansive Yume Nikki fangame that can probably boast having the largest explore-able world of any out there, due to its collaborative nature; "completion" of the game (regarding getting all effects and seeing an ending locked behind it) is made far less enjoyable than other fangames as a consequence of this, and I needed to look up the locations of two or three of them. Regardless, if you can find joy in the heavy variety of styles and locales, you may very well enjoy this one; it's considered one of the greats for a good reason, I'd say.
Certain links to different areas/events requiring certain effects is particularly frustrating due to the combination massive open world and sometimes-esoteric effect hiding spots though, so keep that in mind if it takes you a while to find certain keys you need to progress, like being able to tear down wooden barricades over doorways.