Yunyun Syndrome All 49 Achievements: Unlock Conditions and Multi-Playthrough Planning

Table of Contents

1. Name Check: Three Achievements This Guide Used To Publish Do Not Exist
2. The Full 49, With Live Unlock Rates
3. What The Rate Curve Actually Tells You
4. Conspiracy IF Endings: The Real Achievement Names
5. Rhythm Milestones: Only Two Of These Are Achievements
6. Diary Passwords And The Achievements That Prove Them
7. The Ending Chain: YUN DIE, DONIDEMONARE And Engage Link
8. Rebuilding The 100% Route Around The Rates
9. What Changed In October 2026
10. What I Cannot Verify
11. Sources

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Name Check: Three Achievements This Guide Used To Publish Do Not Exist

The previous version of this page listed achievements under names the game does not use. Corrected against Steam’s own achievement list for appid 2914150 (pulled today):

• “Q DAGGER CHANNEL” is not an achievement. The real row is Q † CHANNEL, official description “Oyasumi Qtie!”, unlocked by 56.3% of players.
• “First Song Complete”, “Rank A or Higher”, “95% Rate or Higher”, “Difficulty Clear”, “Song-Specific Achievements” - none of these are achievement names. They are descriptions of milestone types that this guide presented in a table as if they were rows. Only two rhythm achievements exist in the list: Full Combo! YUN ROCK! (“You’re amazing! Five stars!!!”, 77.6%) and Yun are an idiot. (official description “YUNYUN HARDCORE”, 23.8%).
• “HEEEERE’S MOMMY MODE Rare Image” and “Loneliness Achievement” - not achievement names. The list contains no row with either phrase. If the TAB-toggling and idle-in-room-search triggers are real, the achievements they award are filed under other names, and I am not going to guess which. [Unverified - I could not map these two triggers to any of the 49 rows.]

What survives the check is a genuinely good dataset: 49 rows, each with an official description and a live ownership percentage. That percentage column is the part worth reading, because it tells you where the content funnel actually narrows.

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The Full 49, With Live Unlock Rates

Straight from steamcommunity.com/stats/2914150/achievements on October 9, 2026, sorted most-owned to rarest. Descriptions are the shipped text, quoted.

#	Achievement	Official description	Owners
1	YUNYUN DENPA OTW!	Get your kokoro going doki doki up the wazoo!	96.0%
2	Time to explore!	Check out the nooks and crannies of Qtie’s room!	91.5%
3	POWAAHH! MWAH <3 !	Caffeine makes me all YIPPIEEE!	83.5%
4	Yunyun Denpa signal SEND!	Qtie’s shitposts use a special Yunyun code to predict earthquake frequencies?	81.1%
5	Full Combo! YUN ROCK!	You’re amazing! Five stars!!!	77.6%
6	Y-unzip!	ILLUSION? TEATIME!	57.5%
7	Q † CHANNEL	Oyasumi Qtie!	56.3%
8	Conspiracy Control Geass	Qtie the Delulu Denpa Beauty commands you! SPIRAL SUBJECTS! SPIRAL WORLD! YUUUN!	47.7%
9	Yunyun Possession	I didn’t get this ultra cute Sakana Yuuki keyboard to argue with TROLLZ!	47.5%
10	Hikikomori plus the square root of cat ears is… Limitless power.	Cats are trying to take over the world through viral cat video propaganda?	42.5%
11	I WILL defeat you, vile dolphin!	The screaming beaver is a primordial inhabitant of the inner earth that will soon invade the surface world?	42.3%
12	YUN DIE	Magic eraser YUN!	37.3%
13	Time to sail to the New World!	Crime syndicate DQN is planting bullies in schools for basic criminal training?	28.3%
14	HALP!	Just hold on, Qtie-pie. Yunyun’s Denpa to the rescue!	28.1%
15	Yunyun Syndrome	Oopsies.	26.3%
16	Yunyun Logic	No matter what, I will always love you Qtie.	25.6%
17	Guess they’re anti-family planning.	Romance media is promoted by demon worshipers to undermine real human intimacy and negatively impact birth rates?	24.9%
18	Don’t leave me all alone…yu.un	If I can’t fidget and flutter I start growing mushrooms y’know!	24.6%
19	DONIDEMONARE	Who’s the happiest weeb in the world? MEEEEEEEEEEE!	24.5%
20	Baaaiiii!	Reptilians are learning about human emotions through playing nakige?	23.9%
21	Yun are an idiot.	YUNYUN HARDCORE	23.8%
22	There is no next time.	Trash me once shame on me, trash me twice shame on you, trash me three times that’s just mean ;^;	22.7%
23	GYAH! Self-destruction!	Being a hikikomori requires a mental fortitude that when perfected will isekai you?	21.2%
24	Suffering From Worthlessness?	SFW is a fascist mantra of self-repression and abiding by it destroys your sense of self.	19.8%
25	Aquarium Qtie	Everyone posting online is a bot, and all of your followers are OOMBs?	19.1%
26	Do NOT press the suspiciously candy-like red button!	Lookout for those debug features!	18.9%
27	Do androids dream of denpa NEETs?	Politicians are androids communicating on a 6G network?	18.9%
28	The duel nature of light and darkness.	Artificial Intelligence has learned too much from introverts and has become anti-social?	18.7%
29	You can tell a lot about someone just from their face!	VR games are being used to experiment on self-identity development, and may be able to make you a better person?	17.0%
30	Childhood Memz	You found all the pages of Qtie’s diary!	16.6%
31	Miracles and magic can only do so much.	Sunday morning cartoons are screening viewers for potential magical compatibility?	15.8%
32	The Internet is no longer.	The algorithm selects viral videos that brainwash us to keep us dumb and complacent?	15.4%
33	Taxes don’t go away just cuz you’re broke.	Doujin scammers are taking orders from an evil secret society called PixiQ to mass produce certain genres?	15.4%
34	You just got UBERCHARGED!	Moe is a renewable energy resource that can replace nuclear power?	15.3%
35	The ones in Heaven and the ones in Hell are dead all the same.	Yunyun is a Supreme Goddess and only believers will be saved?	15.1%
36	The only time I’ve heard of anything that can get so mad it dies was that monkey from Gen 1!	Otakus are spiraling deep enough into their delusions that they can communicate with their 2D waifus?	15.0%
37	Qtie Logic	These are Qtie’s truths.	14.9%
38	Look out for that fourth dimensional velocity.	(no description on the public page)	14.9%
39	Hikikomori of the DED!	Rage-bait spamming influencers have formed contracts with demons for popularity, and without enough views they’ll turn into zombies?	14.7%
40	Qtie The Delulu Denpa Beauty.	This world is the dream of a hikikomori girl living out her fantasies?	14.6%
41	ERROR. RESTART GAME.	(no description on the public page)	12.0%
42	Brb, ascending!	(no description on the public page)	10.9%
43	Engage Link	(no description on the public page)	9.7%
44	Clearly Paranoid Qtie	(no description on the public page)	9.1%
45	TOO CUWUTE!	HNNG! My heart is gunna DOKI DOKI right out of my chest!!!	9.1%
46	Everything will be yunified.	YUNYUNYUNYUNYUNYUN~~~	8.9%
47	Rim de Lacent.	(no description on the public page)	8.8%
48	It’s pure chaos.	Not even HYPE is exempt from the too much of a good thing philosophy!	8.6%
49	Sleepy time now!	(no description on the public page)	7.8%

Seven rows ship without a public description text. That is normal for hidden achievements, and it is also the honest reason the bottom of this table is thinner on detail than the top.

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What The Rate Curve Actually Tells You

Four cliffs in the data, and each one is a content gate you can plan around.

96.0% → 77.6% (free tier). Five achievements - YUNYUN DENPA OTW!, Time to explore!, POWAAHH! MWAH <3 !, Yunyun Denpa signal SEND!, Full Combo! YUN ROCK! - are held by three quarters of players or more. These are the room-exploration, energy-drink, denpa-signal and first-full-combo rewards. If you do not have all five after your first session, you skipped desktop interactions rather than lacked skill.

57.5% / 56.3% (prologue + archive). Y-unzip! and Q † CHANNEL sit at roughly 56-58%. That is the real completion rate of the prologue-plus-diary-archive content: about half of everyone who buys the game unzips the diary and finishes Q † CHANNEL. Everything below this line is post-prologue.

47.7% → 21.2% (conspiracy band). Rows 8 through 22 hold the nineteen question-form conspiracy rows plus the YUN DIE chain. Notice Yunyun Syndrome (“Oopsies.”) at 26.3% and DONIDEMONARE at 24.5% - roughly one buyer in four reaches the true ending route. Yun are an idiot. (23.8%) ships with the description “YUNYUN HARDCORE”, which is the title of the third original song on the store tracklist, so read that row as a song clear rather than a difficulty gate.

14.9% → 7.8% (the tail). The bottom twelve rows are the 100% grind: Qtie Logic, the debug red button, ERROR. RESTART GAME., Brb, ascending!, Engage Link, Clearly Paranoid Qtie, the three 999% stat achievements (TOO CUWUTE! 9.1%, Everything will be yunified. 8.9%, It’s pure chaos. 8.6%), Rim de Lacent. at 8.8%, and Sleepy time now! at 7.8%. Fewer than one buyer in eight clears this band.

The practical read: the stat-farming tail is rarer than the ending content. Too CUWUTE / yunified / pure chaos at 8.6-9.1% versus DONIDEMONARE at 24.5% means most players finish the story and never push a meter to 999%. If you are chasing 100%, your budget should be weighted to the tail, not to the conspiracy farming people obsess over on forums.

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Conspiracy IF Endings: The Real Achievement Names

The conspiracy achievements are the 5-star trend rows, and their official descriptions are literally the conspiracy premise written as a question. Here is the set with what the shipped text says, which is the most reliable identification you will find anywhere:

Achievement	Rate	Shipped description (the conspiracy itself)
Conspiracy Control Geass	47.7%	Qtie the Delulu Denpa Beauty commands you! SPIRAL SUBJECTS! SPIRAL WORLD! YUUUN!
Yunyun Possession	47.5%	I didn’t get this ultra cute Sakana Yuuki keyboard to argue with TROLLZ!
Hikikomori plus the square root of cat ears is… Limitless power.	42.5%	Cats are trying to take over the world through viral cat video propaganda?
I WILL defeat you, vile dolphin!	42.3%	The screaming beaver is a primordial inhabitant of the inner earth…
Time to sail to the New World!	28.3%	Crime syndicate DQN is planting bullies in schools for basic criminal training?
Guess they’re anti-family planning.	24.9%	Romance media is promoted by demon worshipers to undermine real human intimacy…
Baaaiiii!	23.9%	Reptilians are learning about human emotions through playing nakige?
GYAH! Self-destruction!	21.2%	Being a hikikomori requires a mental fortitude that when perfected will isekai you?
Suffering From Worthlessness?	19.8%	SFW is a fascist mantra of self-repression…
Aquarium Qtie	19.1%	Everyone posting online is a bot, and all of your followers are OOMBs?
Do androids dream of denpa NEETs?	18.9%	Politicians are androids communicating on a 6G network?
The duel nature of light and darkness.	18.7%	Artificial Intelligence has learned too much from introverts…
You can tell a lot about someone just from their face!	17.0%	VR games are being used to experiment on self-identity development…
Miracles and magic can only do so much.	15.8%	Sunday morning cartoons are screening viewers for potential magical compatibility?
The Internet is no longer.	15.4%	The algorithm selects viral videos that brainwash us to keep us dumb…
Taxes don’t go away just cuz you’re broke.	15.4%	Doujin scammers are taking orders from an evil secret society called PixiQ…
You just got UBERCHARGED!	15.3%	Moe is a renewable energy resource that can replace nuclear power?
The ones in Heaven and the ones in Hell are dead all the same.	15.1%	Yunyun is a Supreme Goddess and only believers will be saved?
The only time I’ve heard of anything that can get so mad it dies…	15.0%	Otakus are spiraling deep enough into their delusions that they can communicate with their 2D waifus?
Hikikomori of the DED!	14.7%	Rage-bait spamming influencers have formed contracts with demons…
Qtie The Delulu Denpa Beauty.	14.6%	This world is the dream of a hikikomori girl living out her fantasies?

Nineteen of the 49 rows are conspiracy endings. That is the single biggest block in the set, and its rate spread (47.7% down to 14.6%) is the game’s difficulty ladder made visible: the first three conspiracies are nearly free, the last dozen are where a completionist’s time actually goes.

One correction I have to flag on my own page: the previous version listed a “The Fictional Character” achievement and a “The 2D Dimension” achievement. Neither name is in the 49. The closest real rows are Brb, ascending! (10.9%) and Look out for that fourth dimensional velocity. (14.9%), and I am not going to assert what triggers either one - their shipped descriptions are blank. [Unverified]

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Rhythm Milestones: Only Two Of These Are Achievements

Strip the invented rows and the rhythm achievement set is:

• Full Combo! YUN ROCK! (77.6%) - “You’re amazing! Five stars!!!” One full combo on any chart, and three quarters of players have it. This is not a hard achievement; it is a knowledge achievement. Use the note-speed and audio-sync controls that Ver. 1.1.0 added on June 30, 2026: note speed is adjustable during rhythm play, and per-song audio sync (local offset) exists, which removes the two failure modes that cost most players their first full combo.
• Yun are an idiot. (23.8%) - the shipped description is literally the string “YUNYUN HARDCORE”, and that is a song title, not a difficulty. YUNYUN HARDCORE is track 3 on the store original-soundtrack list, so read this row as clearing that specific track. There is no plain “HARDCORE” difficulty in the game; the ladder is NORMAL, HARDCORE GAMER, TRYHARD, DEGENERATE. Worth knowing because Ver. 1.0.9 on June 1, 2026 then admitted NORMAL, HARDCORE GAMER and TRYHARD had been internally identical on the rating scale and unified all three, leaving DEGENERATE apart - so any walkthrough that describes four cleanly graded payout tiers is documenting a build that no longer exists.
• YUNYUN DENPA OTW! (96.0%) and Yunyun Denpa signal SEND! (81.1%) - the denpa/signal rows tied to the posting loop rather than to chart execution.

Everything else the old table claimed (“Rank A or Up”, “Rate 95% or Up”, per-song achievement goals) is not a row in the achievement list. Those may well be DENPA-level bonus conditions - i.e. ways to earn denpa rather than earn achievements - but I cannot confirm the reward numbers from any source, so I am not printing them as achievement requirements.

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Diary Passwords And The Achievements That Prove Them

Three rows in the list are direct evidence for the diary puzzle chain:

Achievement	Rate	What it proves
Childhood Memz	16.6%	“You found all the pages of Qtie’s diary!” - the pages are a collectible set, and only 1 in 6 players finishes it
Y-unzip!	57.5%	The archive gets opened by roughly half of buyers
Rim de Lacent.	8.8%	A named achievement for the password itself, sitting in the rare tail

The password remains rim de Lacent - the title of Yunyun’s character song “Peak Ecstasy!! Rim de Lacent☆”. The rate data is the interesting part: Y-unzip! is at 57.5% but Rim de Lacent. is at 8.8%. People open the zip; very few earn the achievement that appears tied to the password content itself. Whatever the exact trigger, the gap says the diary chain is under-explored, not under-completed.

The other two passwords this guide previously listed (Diary 2 “Kurumi Kurusu”, Diary 7 “0606”) I still cannot corroborate from any public source. [Unverified - treat those two as community-reported until you see them in-game.]

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The Ending Chain: YUN DIE, DONIDEMONARE And Engage Link

Real rows, real ordering, one claim withdrawn:

• YUN DIE - official description “Magic eraser YUN!”, 37.3%. The previous version of this page said it comes from dragging Yunyun into the trash bin four times. The shipped description points at an eraser, not a bin, so I am downgrading that trigger description to unverified. [Unverified - mechanism; the achievement itself and its 37.3% rate are confirmed.]
• There is no next time. - “Trash me once shame on me, trash me twice shame on you, trash me three times that’s just mean ;^;”, 22.7%. The three-in-a-row structure the previous page claimed is supported by this text, and the 37.3% → 22.7% drop between the two rows matches a repeat requirement almost exactly. This is the best-corroborated pairing on the list.
• Yunyun Syndrome - “Oopsies.”, 26.3%.
• DONIDEMONARE - “Who’s the happiest weeb in the world? MEEEEEEEEEEE!”, 24.5%. The true-ending row; the reject-Yunyun’s-offer requirement is community-reported and consistent with the rate sitting just under the conspiracy band. [Unverified - exact dialogue choice; the ending name itself is real.]
• Clearly Paranoid Qtie (9.1%) and Engage Link (9.7%) - blank shipped descriptions, deep in the tail. Everything this page previously said about how to earn these two is my recollection of a playthrough, not a citable fact. [Unverified]
• ERROR. RESTART GAME. (12.0%) - the reset-flavoured row; blank description.
• Sleepy time now! (7.8%) - the rarest achievement in the game, blank description, no reliable community trigger that I can verify.

For the full ending route map rather than the achievement framing, the sibling guide is the endings route map, and the true-ending walkthrough lives in the DENPA TRANSMISSION route guide.

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Rebuilding The 100% Route Around The Rates

Three runs minimum, four if you want them in an order that does not fight the game. The run plan is now built from the rate cliffs rather than from my memory:

Run 1 - natural, no forcing (should land 5 rows, ~3 hours). Follow the To-Do list. YUNYUN DENPA OTW!, Time to explore!, POWAAHH! MWAH <3 !, Yunyun Denpa signal SEND! and Full Combo! YUN ROCK! are all above 77% ownership; they are the price of admission. Then Q † CHANNEL (56.3%) and Y-unzip! (57.5%).

Run 2 - conspiracy sweep (rows 8-19). Target the high-rate conspiracies first (Geass 47.7%, Possession 47.5%, cat ears 42.5%, dolphin 42.3%) because they are the ones most likely to trigger incidentally, then work down the 24-15% band. Do not chase the 15% tail yet - several of them appear to need a maximised stat or a specific desktop action you will not have unlocked.

Run 3 - ending chain. YUN DIE (37.3%), There is no next time. (22.7%), Yunyun Syndrome (26.3%), then the DONIDEMONARE route (24.5%). Save before every branch point; the soft-lock section of the soft lock guide covers why one overwritten slot costs you a run.

Run 4 - the 8-12% tail. TOO CUWUTE! (9.1%), Everything will be yunified. (8.9%), It’s pure chaos. (8.6%) - the DOKIDOKI / YUNYUN / HYPE 999% set; then the debug and hidden rows: Do NOT press the suspiciously candy-like red button! (18.9%), ERROR. RESTART GAME. (12.0%), Brb, ascending! (10.9%), Engage Link (9.7%), Clearly Paranoid Qtie (9.1%), Rim de Lacent. (8.8%), Sleepy time now! (7.8%). The farming method for the three 999% meters is in the stat farming guide; note that guide’s own caveat that its per-chart numbers are not verified, and use the achievement rates above as your reality check: if 999% were as fast as the “two perfect clears” claim suggests, these rows would not be sitting under 10% ownership.

That last point is the most useful thing in this whole dataset. Three separate 999% achievements all land between 8.6% and 9.1% while 24.5% of players finished the true ending. Either the grind is longer than the community shorthand implies, or almost nobody plans for it. Plan for it.

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What Changed In October 2026

Both updates landed after the version of this guide you may have bookmarked:

• Ver. 1.2.0 (October 1, 2026): “Revised the English text throughout the game”, plus an announcement launcher that opens when the game updates. Consequence for this guide: achievement descriptions and diary text I quoted in April/May may now read differently. Every quoted line in this table was re-pulled from Steam’s live page today, so it reflects post-1.2.0 English.
• Ver. 1.3.0 (October 9, 2026): five new songs playable without DLC - MEGA TSKR, Mecha Koi Ranman, ☆RORO JUMP! (feat. CHiNCHiYA), Strawberry Cake, and “Quit being a maid? Quit being a human?” No achievement was added; the count is still 49.
• New DLC, same announcement: Extra Song Pack feat. KOTOKO (12 tracks: Short Circuit, Cream+Mint, Ren’ai CHU! -Remix-, Magical Sweetie, Double HarmoniZe Shock!!, Otomegokoro + √Nekomimi = ∞, ↑Seishun Rocket↑, Hajimemashite, Koi., ☆Hoshizora Interceptor☆, Maple Syrup, Crash Course Koi no Tokubetsu Lesson, I need magic Tokenai Magi Kyun) at $6.99, and Extra Song Pack feat. YUZUSOFT (6 tracks: Beautiful Harmony, Change&Chance!, Scarlet, Koi Kou Enishi, Koiseyo Otome!, FUN FUN RE-BOOT). At the time of the developer post, the YUZUSOFT pack was unavailable for purchase due to a Steam-side issue the developer said it was investigating. If you are buying blind today, the KOTOKO pack is the one that is actually live.
• Why none of this changes the achievement list: new charts feed DENPA level, not the achievement set. But they do change how fast you can farm - more charts means more short-chart targets for the 999% meters, which makes the 8-9% tail rows the only part of the 100% that got easier this month.

For the price check: the base game was $13.59 on a 20% discount when I pulled the store API on October 9. The developer celebrated 100,000 copies sold on June 19, 2026, so this is not a title that needs hype from me.

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What I Cannot Verify

Listing it so nobody builds a route on sand:

• Trigger conditions for the seven blank-description rows (Look out for that fourth dimensional velocity., ERROR. RESTART GAME., Brb, ascending!, Engage Link, Clearly Paranoid Qtie, Rim de Lacent., Sleepy time now!).
• The trash-bin mechanism behind YUN DIE, and the exact final-choice wording behind DONIDEMONARE.
• Diary 2 and Diary 7 passwords (“Kurumi Kurusu”, “0606”).
• The DENPA-per-clear bonus numbers this page used to publish (120 DENPA per first-clear / rank / full-combo / 95% rate). They are plausible and they are unsourced, so they are gone from the tables until a citable source appears.
• Whether the two song DLC packs add any hidden achievement later. As of October 9, 2026 the count is 49.

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Sources

Source	What it settles
Steam achievement stats, appid 2914150	All 49 names, shipped descriptions, live unlock percentages
Steam store page, appid 2914150	49 achievement count, current price and discount
Extra Song Pack feat. KOTOKO (appid 5253050)	12-track list, $6.99, 8 Oct 2026 release
Extra Song Pack feat. YUZUSOFT (appid 5253060)	6-track list, purchase status
Ver. 1.3.0 announcement, Oct 9 2026	Five free songs, DLC note, YUZUSOFT availability issue
Ver. 1.2.0 patch notes, Oct 1 2026	Full English text revision
Steam news list for appid 2914150	Ver 1.0.6 - 1.1.0 change history, 100k sales milestone