- Muma Rope (Muma│Rope)/tour
- Muratsuki
- Musou Yuugi (夢想遊戯)
- Musou Yuugi (夢想遊戯)/guide
- Musou Yuugi (夢想遊戯)/tour
- Musubitsuki (結びつき)
- Musuu (夢数)
- Musuu (夢数)/guide
- Musuu (夢数)/reference
- Musuu (夢数)/theories
- Musuu (夢数)/tour
- Mutsuki (夢付き)
- Muyuu (ムユウ)
- Muyuu (ムユウ)/guide
- Muyuu (ムユウ)/tour
- Mva-g45
- My Dreams
- My Dreams/tour
- My Favorite
- My Favorite/guide
- My Favorite/tour
- Mylica
- Märchen
- Märchen/guide
- Märchen/tour
- M∞N
- M∞N/guide
- M∞N/tour
- N'Oubliez Jamais
- N'Oubliez Jamais/guide
- N'Oubliez Jamais/tour
- NASU Pinball
- NASU Pinball/tour
- NASU Plus
- NASU Plus/tour
- Nagatsuki (永付き)
- Nagi (凪)
- Naive
- Nakime (ナキメ)
- Nakitsuki (なきつき)
- Nameless (ねーむれす)
- Nana
- Nana/guide
- Nana/tour
- Nana (Character)
- Nancy
- Naomi
- Naoto
- Nat
- Natalie
- Nathan
- Natsuki (なつき)
- Natsumi Kokochi (夏見心地)
- Natsumi Kokochi (夏見心地)/guide
- Natsumi Kokochi (夏見心地)/tour
- Naylan
- Nebi
- Nee
- Negaigoto (ねがいごと)
- Negaigoto (ねがいごと)/guide
- Negaigoto (ねがいごと)/theories
- Negaigoto (ねがいごと)/tour
- Neimu
- Nejirisu (ねじりす)
- Nejitsuki (ねじつき)
- Neko Yume Douchuuki (猫夢道中記)
- Neko Yume Douchuuki (猫夢道中記)/guide
- Neko Yume Douchuuki (猫夢道中記)/tour
- Nekonoha Yashiro (ネコノハヤシロ)
- Nemu (ねむ)
- Neonsomnia
- Neonsomnia/guide
- Neonsomnia/tour
- Netsuki (寝付き)
- Nex
- Nexus0.10
- Nicolas
- Nigella
- Nigella/guide
- Nigella/soundtrack
- Nigella/tour
- Night Shift
- Night Shift/tour
- Nightmare Castle
- Nightmare Castle/guide
- Nightmare Castle/tour
- Nightmare Diary
- Nightmare Diary/guide
- Nightmare Diary/tour
- Nightmares and Other True Stories
- Nightmarescape
- Nightmarescape/guide
- Nightmarescape/reference
- Nightmarescape/soundtrack
- Nightmarescape/theories
- Nightmarescape/tour
- Nihil
- Nihil/guide
- Nihil/tour
- Nijuu Yuumu (二重遊夢)
- Nijuu Yuumu (二重遊夢)/guide
- Nijuu Yuumu (二重遊夢)/tour
- Nika
- Nilson
- Nina
- Ninfea (にんふぇあ)
- Nio
- Nio (Wait for Daylight)
- Nire (にれ)
- Niyatsuki (にやつき)
- No Outlet
- No Outlet/guide
- No Outlet/tour
- Nobetsu Maku Nashi (のべつまくなし)
- Nobetsu Maku Nashi (のべつまくなし)/guide
- Nobetsu Maku Nashi (のべつまくなし)/tour
- Nocti
- Nocti/guide
- Nocti/tour
- Nocti (character)
- Nocturne
- Nocturne/tour
- Noelia
- Noildoof
- Noiracide
- None
- None/guide
- None/tour
- None (Character)
- Nonoka (野の花)
- Nora
- NostAlgic
- NostAlgic/guide
- NostAlgic/theories
- NostAlgic/tour
- Noumena
- Noumena/guide
- Noumena/tour
- Noyemi K
- Nrutaz (填始)
- Nueko (ぬえ子)
- Nuitsuki (ぬいつき)
- Number 56346
- Nuxill
- NvmU
- NvmU/tour
- Nyan Nikki
- Nyashtr
- Nyasuki
- Nyrator
- OMORI x Yume Nikki Crossover Fangame
- ONASU
- ONASU/tour
- OTSUKEMONO
- Obligatory
- Obligatory/guide
- Obligatory/tour
- Obligatory (bro77777)
- Oblivion
- Oblivion/guide
- Oblivion/tour
- Oborogi (おぼろぎ)
- Obox
- Obox/guide
- Obox/tour
- ObscuritySTA
- Oddy's Lost and Found
- Oddy's Lost and Found/tour
- Odeio Sonhar
- Odeio Sonhar/tour
- Of Fake Town
- Of Fake Town/guide
- Of Fake Town/tour
- Ofudatsuki (お札付き)
- Okuri (送)
- Okuri (送)/guide
- Okuri (送)/tour
- Old Test
- Older
- Older/guide
- Older/tour
- On Border
- On Border/tour
- One-WAY
- One-WAY/guide
- One-WAY/tour
- Oneiro
- Oneiro/tour
- Onohi
- Onohi/guide
- Onohi/tour
- Onslaught14
- Openlid
- Ophanimkei
- Orange100%@Aitsuki (オレンジ100%@あいつき)
- Orchidmantis
- OriYume (オリ夢)
- Origamitsuki (おりがみつき)
- Otetsuki (おてつき)
- Otetsuki (おてつき)(Yumeiro)
- Other Realm
- Otokonoko
- Oudn
- Ouiki
- Our magic window
- Our magic window/guide
- Our magic window/tour
- Ouri
- OutlanderS3S
- Outsider
- Outsider/tour
- Overdrive (オーバードライブ)
- Overdrive (オーバードライブ)/guide
- Overdrive (オーバードライブ)/theories
- Overdrive (オーバードライブ)/tour
- Overgrowth
- Overgrowth/guide
- Overgrowth/tour
- Oversomnia
- Oversomnia/guide
- Oversomnia/tour
- Owl
- Oxygenvil
- P.S.Rose
- P.S.Rose/guide
- P.S.Rose/reference
- P.S.Rose/tour
- P0lter
- PEK
- POSTMORTEM
- POSTMORTEM/tour
- Pa-nap
- Page Layout Guides
- Pale
- Panda. (ぱんだ。)
- Papr Wrld
- Papr Wrld/tour
- Parade
- Parade/guide
- Parade/theories
- Parade/tour
- Paradox Lost
- Passing By
- Passing By/tour
- Pastel x Pastels
- Peijipnag
- Permafrost
- Permafrost/tour
- Pershina (ペルシナ)
- Perverse Suffering
- Phobia
- Phobia/guide
- Phobia/tour
- Phoeno (ふぇの)
- Physicality (フィジカリティ)
- Physicality (フィジカリティ)/guide
- Physicality (フィジカリティ)/reference
- Physicality (フィジカリティ)/tour
- Pico
- Pico/guide
- Pico/tour
- Piko
- Pingupingn
- Pionpi
- PixelNovak
- Planet Ennea
- Planet Ennea/guide
- Plasmanaut Is Alone
- Plasmanaut Is Alone/guide
- Plasmanaut Is Alone/tour
- Pon
- Portrait of Sanity
- Portrait of Sanity/tour
- Press Play
- Press Play/tour
- Project Somnia
- Projector
- Projector/guide
- Projector/theories
- Projector/tour
- Protagonist (4185113)
- Protagonist (A Quiet Air)
- Protagonist (Alien Flowers)
- Protagonist (Aura Aspic)
- Protagonist (Bad Birds)
- Protagonist (Bizzare)
- Protagonist (Dream's Deep)
- Protagonist (Dreamgame)
- Protagonist (Hentekorin)
- Protagonist (Memoria)
- Protagonist (Mild Dream)
- Protagonist (Miserere)
- Protagonist (Outsider)
- Protagonist (Papr Wrld)
- Protagonist (Puchi Nikki)
- Protagonist (Px)
- Protagonist (Reap and Sow)
- Protagonist (Sigil)
- Protagonist (Single Line)
- Protagonist (Somnium Angelus)
- Protagonist (Syndoy)
- Protagonist (Trade Effluent)
- Protagonist (Traumruf)
- Protagonist (Yume no Oto)
- Protagonist (yqriel)
- Protagonist (奇妙な日記)
- Proteus
- Pry
- Psyder
- Puchi Nikki (ぷちにっき) (Nintendo 3DS)
- Puchi Nikki (プチニッキ)
- Puchi Nikki (プチニッキ)/tour
- Puck
- Pumpkin
- Pure
- Pureiceblue
- Px
- Px/guide
- Px/tour
- Pyromantic
- Pythia
- Q73
- Q73/changelog
- Q73/guide
- Q73/tour
- Qiu Qin (秋琴)
- Quiesphere
- RAHU
- REM
- REM-9: The Yume Nikki Randomizer
- REM-9: The Yume Nikki Randomizer/tour
- REM/guide
- REM/tour
- RPG Maker 2000
- Rain And Red Roses
- Rain And Red Roses/guide
- Rain And Red Roses/tour
- Raina
- Rainychan
- Rakugaki Studio (らくがきスタジオ)
- Ralren
- Ranamoneud
- Rayinpixels
- Re:Vessel
- Re:Vessel/guide