Arknights ARG #2: The Last Letter, the Last Order

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The second ARG campaign of Arknights, titled "The Last Letter, the Last Order," was held between April 25–29, 2021, deciphered by GORIE during which PV 3 was released on the CN server.

Phase 1

The decipherment began from 02:31, the scene that displayed "We Are Heading East." When brightened, it displayed a group of numbers that were identified as ASCII codes. When converted, they were deciphered as:

116/104/101/32/111/110/108/121/32/109/111/110/115/116/101/114

The Only Monster
PV3-Decoding game image 1.jpg

When typing "/theonlymonster" with Arknights' CN official website URL (https://ak.hypergryph.com/theonlymonster), it displayed a group of Unicode titled "Unite: The Past, Present, and Future..." The Unicode deciphered was the same quote by Theresa at the beginning of PV3:

The moment you reading this, the ending act must already be played.

After typing "/unite" on the URL (https://ak.hypergryph.com/unite), it displayed only a black page. Nevertheless, there was a hint given by the file name, "(2)oczjigthjinozmdn_.jpg," and they were Caesar code that were deciphered as "the only monster is".

Phase 2

The second clue was first given from the ASCII code which also contained four numbers surrounding it: 001,001, 002, and 003. In 01:00 of PV3, the scene where it displayed "Infected." It contained four symbols on four corners when brightened, representing the seconds on all three PVs that contained similar symbols: ◇ 1 2 (PV1, 0:12 ); ◇ 1 4 (PV1, 00:14); ▲ 2 3 1 (PV2, 03:51); ∅ 2 1 5 (PV3, 03:35; the symbol represents no symbol on the scene).

PV3-Decoding game image 2.jpg

Starting from the two 001, the cut contains the phrase "The only monster is your mind." Entering "/yourmind" with the official website URL (https://ak.hypergryph.com/yourmind), it showed another group of Unicode that was deciphered as this:

You said the stars beyond skyveil are arks sailing through the stellar lane...
You said the stars beyond skyveil are arks sailing through the stellar lane...

The Unicode group also contained similar symbols with those on the cut scene, but with different numbers: ◇ 4/6; ◇ 5/6; ▲1/16; ∅ 1/10. The first numbers represented the number order of words in the phrase, and the second number represented the total number of words:

  • ◇: "The only monster is your mind."
  • ◇: "The only monster is your [note 1] mind."
  • ▲: "Idealism is that you will probably never receive something back but nonetheless still decide to give."
  • ∅: "Great ideals but through selfless struggle and sacrifice to achieve."
PV3-Decoding game image 3.jpg

The deciphered phrase was "Is Your Idealism Great." The phrase was needed to enter with the official website (https://ak.hypergryph.com/isyouridealismgreat; dead link). The webpage contained two groups of darkened Unicode and several symbols resembling Guard Amiya's conversion symbols. The Unicode groups deciphered were:

You said our different forms were not created, so we crawled, long before we learned to walk.
You said the stars beyond skyveil are arks sailing through the stellar lane...

Phase 3

Entering "/mymind" from "The only monster is my mind" on PV 1 (https://ak.hypergryph.com/mymind), it displayed a checked board with five red diamond shapes. Following the order of board in International Chess, the location of the diamonds gave a series of numerals: "a6c3c8e3g7." Entering the numerals onto the URL (https://ak.hypergryph.com/a6c3c8e3g7), it showed a similar board, but this time with the same symbols on "isyouridealismgreat" webpage surrounding the board. This clue was regarded as the hardest, but nonetheless, they were deciphered by imagining the diamonds as a prism refracting light and light rays being refracted by the prism as lines connecting similar symbols.

After pinpointing the similar symbols, the result was revealed as "a4b7d1e2h3." Entering it with the URL (https://ak.hypergryph.com/a4b7d1e2h3), it showed a page with a group of Unicode that was deciphered as:

The wonderous things you said... Kal'tsit, I remembered. I remembered them all.

Beneath the Unicode group was the word "After" and a series of numerals in Base36, "C16GT." After converting them to decimal numbers, it showed "20210429," the date for the final revelation.

Phase 3 progress gallery

Final results

PV3-Decoding game image 9.jpg

Entering the date on the website, (https://ak.hypergryph.com/20210429), it displayed another page with Unicode with the phrase at the bottom saying "THELASTLETTER ORDERLASTTHE" ("The Last Letter, the Last Order"). The Unicode was deciphered as:

You said the earth we knew was but a layer of mud, littering upon a celestial orb...

By entering "the last letter" on the website (https://ak.hypergryph.com/thelastletter), it revealed the final reward: a voice recording of Theresa as her final letter to Kal'tsit.

Theresa's Last Letter

The letter is also included in Kal'tsit's Promotion Record.

あなたがこの手紙を読んでいるということは、きっと全て片付いた頃ね。
……私に説いてくれたたくさんの学説を憶えているかしら?私はずっと憶えているわ。
この大地には限りがあって、それは一つの球体の表面をわずかに覆う土でしかないと。
私たちの身体は最初からこうだったわけではなくて、歩けるようになるまでは地を這っていたこともあると。
あの星々は私たちの足下に広がる大地と同じように、空の軌道を進む筏であると……
ケルシー、そんなあなたの言葉を、私はどれも憶えている。

あなたは、私たちの行いに意味を見出すよりも、自身に関する答えが知りたいといっていたわね。私がこの船にどんな思いを込めているのか、どうしてこの船をそんなに大切にしているのか、そんなことを何度も聞いてきたでしょう?
とても幼稚な答えだったから、結局最後まではっきりと伝えられなかったわ。
……ケルシー、あなたの孤独は私も感じていたわ。自分には同類がいないと考えていたからでしょう。

ケルシー、私の答えはね、「このロドス・アイランドという船が、あなたの家になってほしいと願っていたから」なの。
あなたと一緒に、そんな未来をこの目で見届けたいなんて考えたことだってあるわ。
ただ、孤独に効く薬はないし、流浪の旅に終わりもない。そして死の病は直せない……
私は自分の精一杯をやったつもりよ。この結末に不満なんてないわ。
バベルの使命はここまでだけど、あなたたちとこの船の旅は、まだ始まったばかりよ。
今。あなたが初めに抱いた疑問を解き明かす時なんじゃないかしら。長い長い夜の後には、ロドス・アイランドにもきっと夜明けが訪れるわ。
暖かな大地を航行する未来は、あなたたちみんなのものなんだから。

ケルシー、私はあなたの同類じゃないわ。あなたの疑問を解いてあげることもできない。
―だけど私はあなたの味方よ、ケルシー。これまでも、これからもずっと。

The moment you read this, the ending act must already be played.
...Do you still remember all those theories you taught me? I always remembered.
You said the earth we knew was but a layer of mud, littering upon a celestial orb.
You said our different forms were not created so, we crawled, long before we learned to walk.
You said the stars beyond skyveil are arks sailing through the stellar lane...
The wonderous things you said... Kal'tsit, I remembered. I remembered them all.

You once said, more than seeking sense in our action, you wanted to learn of the answer to yourself; and for so many times you asked, of those I have committed to this landship, of the reason I commit this very much into it.
I feel the answer is very childlike, so I never directly responded to your question.
...Kal'tsit, I sense your loneliness. Because you feel you have none of the same kind.

Kal'tsit, you shall have my answer at very last: I hope the Rhodes can be a place you name home: an Island you may always return to.
Once I thought too, to witness such future with my own eyes alongside you.
But yet, there is no antidote to loneliness, there is no end to nomadic wandering, there is no cure to a terminal illness...
I already did everything I could do. I won't harbor complaint for my own end.
Babel's mission is concluded, and you and this landship have only just set sail.
Now go, unto your initial grand quest. Through the grim perils of the longest night, Rhodes Island shall breach into the promised dawn.
That future which sails on the tender earth, it belongs to you all.

I am not a same kind as you, Kal'tsit. I cannot explain away your puzzlement.
–But I have always been your companion. And still I will be.

An easter egg was also revealed by converting website "20210429" into .txt format where a readable word "hope" was found. Entering "hope" with the website (https://ak.hypergryph.com/hope) revealed a short audio by Amiya.

Amiya's Request

ドクターは、ずっと私の傍にいてくれますよね。
Will you stay with me forever, Doctor?

External links

For more information to learn more about the ARG decoding process, check out these websites:

Notes

  1. Technically "my," but only "your" works.