Tears of Themis Island Suspense event: Deciphering encryptions
Every encrypted code in the Island Suspense event in ToT, where to find it, and a summary of its decrypted message.
Image credit:HoYoverse
The Island Suspense event in Tears of Themis is something a bit different from most other special events we’ve seen in the game’s five-year history. Following on from the Gladiolus Valley arc, it also forms an important part of the main story and, thus, will be available permanently beyond its initial run, ensuring that new players or those who are behind on the plot don’t miss out.
However, there are still time-limited rewards associated with Island Suspense’s initial duration, alongside several permanent rewards. Many rewards of both types are connected to the encryption codes you can find hidden within the event itself as well as in event trailers and on HoYoverse’s social media. Read on for every encryption cipher in Tears of Themis’ Island Suspense event, where you can find it, and what its decrypted message reads .
Tears of Themis Island Suspense Encryption Ciphers
There are a total of 99 entries under the Clue Collection > Encryption category in the Island Suspense event terminal, of which 69 (obligatory: nice) can be unlocked by entering a cipher text into the Deciphering menu.
Cracking all 69 ciphers satisfies the conditions of “Painstaking Investigator” permanent event task, which also awards you with 10,000 Stellin for your trouble. There’s also a second, linked permanent task, “Keen Eyes”, which awards 5x Intuition Chip II for collecting 94 cipher-related clues (so, deciphering all the codes and, where applicable, following them to the specified location on the event map and interacting with the hidden clue spot). Remember that if you want to fill up your clue codex, you’ll need to track down the relevant clues in-game, even if you use this list to decrypt everything early.
For clarity, there’s no time pressure to complete all decryptions by October 17th, 2025 when the limited-time event expires; whenever you’re reading this guide, as long as Tears of Themis servers are still online, you can still plug all of these codes into the in-game Deciphering device and enjoy the rewards.
Here is every cipher code you need to complete the Encryption Clues codex in Island Suspense:
| Cipher Code | Decrypted Message | Where to find |
|---|---|---|
| 0426 | Happy Birthday (∩_∩)! | Cipher File Special Delivery IV on social media (Artem’s birthday) |
| 0621 | Happy Birthday (^3^ )! | Cipher File Special Delivery IV on social media (Marius’ birthday) |
| 0729 | Happy City Anniversary! | Cipher File Special Delivery IV on social media (Tears of Themis’ original release date in China in 2020) |
| 0927 | Happy Birthday (∩_∩)! | Cipher File Special Delivery IV on social media (Vyn’s birthday) |
| 1018 | My head itches, is something about to happen? Or is the event… about to end…? Please check the supplies prepared for you (2/3): 4B4JWV05RQ | Cipher File Special Delivery IV on social media |
| 1024 | HELLO WORLD! | Story Stage: “Clue Collection: Carefree Communication Device” (under Intel - Other) |
| 112358A | The street-side pothos plants on Zhenyi Street appear abnormal. | Hotel - Outside the Hotel Investigation Point (street utility poles) |
| 1205 | Happy Birthday (≥▽≤)! | Cipher File Special Delivery IV on social media (Luke’s birthday) |
| 3330EE | The rose bushes in the hotel’s floral greenhouse are behaving oddly. | Modern Era Hotel - Hotel Guest Room Investigation Point (sofa) |
| 3RE2FA | There’s something unusual about the sofa in the hotel lobby. | Oracle Research Institute Investigation Point (fountain) |
| 623BOXSUPPER | If you have time, why not check under the cabinet at the temporary headquarters? There might be an unexpected discovery. | Operation Xinjiga Invitation (Vyn’s dialogue; requires invitation event reward to have been unlocked) |
| ALPOS | Hot Springs, Spirits, and Ash Pigeons. | Cipher File Special Delivery V on social media |
| Adjudicator | You are my once-in-a-lifetime heartbeat. | Cipher File Special Delivery II on social media (Vyn’s codename) |
| ANGEL | ANGEL Radio, your number one choice! Traffic and weather reports, popular songs, come here for first-hand info! | Island Suspense Event Trailer + social media updates |
| BERRY2300 | In the candy box at the temporary headquarters, in addition to candy, there’s also a surprise I specially prepared for you. | Operation Xinjiga Invitation (Marius’ dialogue; requires invitation event reward to have been unlocked) |
| BLDR | With the sound of Xuanni, the three giants make their appearance! | Cipher File Special Delivery III on social media |
| BS | Between Shades. When blazing flames are extinguished, ashes will eventually bury greed. | Complete Vyn’s assist action during Island Suspense Story Stage 1-07 |
| BTI | Beneath the Ice. Even outsiders have a right to survive. | Complete Marius’ assist action during Island Suspense Story Stage 1-06 |
| BTOR | Blizzard Villa, Sins of Cynicism. | Cipher File Special Delivery V on social media |
| CFSD | To the meticulous you: meticulous as always. | Cipher File Special Delivery II on social media |
| DAVIS | Today’s fortune: °(>v<)/° | No specific source, HoYoverse just anticipated you might try this! |
| DOREMI | The guardian beast at the entrance of the sanatorium seems abnormal. | Shallow Water Harbor - Wharf Investigation Point (ships in harbor) |
| EASTEREGG | The meaning is literal — this is an Easter egg. | Island Suspense Event Trailer + social media updates |
| EL | A journey to Xuzhou, destiny undecided. | Cipher File Special Delivery V on social media |
| FY | Who did you run into on campus today? | Cipher File Special Delivery V on social media |
| HW | Heart’s Warden. Rock Chasm Point is a place of both peril and adventure. | Complete Luke’s assist action during Island Suspense Story Stage 2-05 |
| HYV | TECH OTAKUS SAVE THE WORLD | No specific source, HoYoverse just anticipated you might try this! |
| KEYCAFE | The hidden investigation point at the coffee shop is at the succulent plant pot. | KEY + CAFE (Coffee Shop map code) |
| KEYFST | The hidden investigation point at Zhenyi Street is in the street-side pothos. | KEY + FST (Zhenyi Street map code) |
| KEYINN | The hidden investigation points at the hotel are: the nightstand in the guest room, and the awning in front of the hotel. | KEY + INN (Hotel map code) |
| KEYMEHTL | The hidden investigation points of the Modern Era Hotel are at: the sofa in the hotel lobby, the rose bushes in the floral greenhouse, and the lampshade in the guest room. | KEY + MEHTL (Modern Era Hotel map code) |
| KEYNLS | The hidden investigation point at the New Life Sanatorium is the guardian beast at the entrance. | KEY + NLS (New Life Sanatorium map code) |
| KEYORI | The hidden investigation point of the Oracle Research Institute is at the glass window at the entrance. | KEY + ORI (Oracle Research Institute map code) |
| KEYSHBR | The hidden investigation points at the Shallow Water Harbor are at: the seabird on the dock, the lifebuoy on the deck, and the bunk bed board in the cabin. | KEY + SHBR (Shallow Water Harbor map code) |
| King | I’ll spend my life sketching your image. | Cipher File Special Delivery II on social media (Marius’ codename) |
| LAVM | This order could be etched into DNA. | |
| LB | Stellis Long Beach - Now offering a service line for foreign nationals, breaking the language barrier, helping with job hunting, residence, buying a home, and even catching a mistress. Whatever you need, we can help! | Cipher File Special Delivery III on social media |
| Libra | Thank you for bringing another possibility into my life. | Cipher File Special Delivery II on social media (Artem’s codename) |
| LOCR | Have you explored the events of Lizhu? | Cipher File Special Delivery V on social media |
| MAPOFSTELLIS | The wind that misses you has blown to Stellis. | Cipher File Special Delivery III on social media |
| MARIN22 | The spare life ring on the front deck looks suspicious. | Shallow Water Harbor - Ship Cabin Investigation Point (diary on table) |
| MASTERKEY | This is a universal cheat key. Enter KEY + location code to receive hints for all hidden clues at that location. | Story Stage: Daily Exploration 1 (“Intel provided by Zangr Stewart”) |
| MI31 | The seabirds at the Shallow Water Port dock are acting strangely. | New Life Sanatorium Investigation Point (birds) |
| MOB | A story hidden in the quiet mines. | Cipher File Special Delivery V on social media |
| MOTLG | The mystery of Nosta is perfectly solved! | Cipher File Special Delivery V on social media |
| NEW23333R | I found something that suits you during the investigation, and I’ve placed it in the mahjong box at the temporary headquarters. | Operation Xinjiga Invitation (Artem’s dialogue; requires invitation event reward to have been unlocked) |
| NXX | The most important thing is for a family to live a good life together. | Cipher File Special Delivery II on social media |
| NXXIS | Everyone from NXX, please take care of your safety. Operation Xinjiga will soon be completed! Please accept the supplies prepared for you (3/3): GTSRCRAZ4Z | Island Suspense Event Trailer + social media updates |
| NXXISLANDSUSPENSE | NXX Investigation Team, ready and assembled! | Xinjiga Secret Information event prelude minigame |
| OS | Orchidshine Idle Villa Butler Recruitment: The employer is often away for business and needs a butler to manage the villa. Age requirement: under 50 years, reliable, responsible, and of good character. Interested parties, please contact. | Cipher File Special Delivery III on social media |
| OSHZXN | There’s something off about the glass windows at the research institute. | Modern Era Hotel - Hotel Lobby Investigation Point (coffee table) |
| PERIL | There’s an anomaly in the succulent potted plants at the coffee shop. | Hotel - Inside the Hotel Investigation Point (upper wall) |
| PV0221KM016155 | I, the super cool little sports car, am back again. | Island Suspense Event Trailer + social media updates |
| Raven | I want to explore the whole truth with you. | Cipher File Special Delivery II on social media (Luke’s codename) |
| ROSES | There’s something unusual inside the lampshade in the hotel guest room. | Modern Era Hotel - Floral Greenhouse Investigation Point (left-hand flowers) |
| SEAGULL1023 | Do you want to return to the temporary headquarters later? I hid a treasure for you under the TV table. | Operation Xinjiga Invitation (Luke’s dialogue; requires invitation event reward to have been unlocked) |
| SHB | Shadowed Boundaries. A mahjong parlor has always been the perfect place to hide secrets. | Complete Artem’s assist action during Island Suspense Story Stage 2-06 |
| SOS2A | There’s something strange inside the awning at the hotel’s entrance. | Zhenyi Street - On the Street Investigation Point (bus license plate) |
| SOTT | Mien’s main street is wide and spacious. | Cipher File Special Delivery V on social media |
| SSC | South Stellis Rentals - 5 stations to the Waterfront! Fully renovated one-bedroom apartment for rent, pet-friendly, only 5k. | Cipher File Special Delivery III on social media |
| STELLIS | Family, friendship and love — may you have all the beauty in life. | Cipher File Special Delivery III on social media |
| TEARSOFTHEMIS | Unraveling love and mystery together! | No specific source, HoYoverse just anticipated you might try this! |
| TEARSOFTHEMIS1521D | You are the only truth of my heart. | Cipher File Special Delivery IV on social media |
| THATISALL | That’s all? Coo coo coo! Coo coo coo coo? Coo coo? | |
| THE99THCIPHER | This is the 99th encryption, no more. Thank you for playing. | Cipher File Special Delivery V on social media |
| TLD | Thank you for playing games from Codename Game Studio! | Cipher File Special Delivery V on social media |
| TOT | Tears of Themis? No! It’s the god of wine drops. If you’re going to invest, invest ten! | No specific source, HoYoverse just anticipated you might try this! |
| TRIALS | Trials of Themis? It’s the Morning Tea Trial! You have to say it out loud clearly: Order a cup of Swimming Mimi Haha Tea with heavy pepper flavor! | |
| TRIP9 | The bedside table drawer in the hotel’s guest room contains something unusual. | Coffee Shop Investigation Point (window) |
| WTRFNT | Waterfront TOD Your best choice for home purchase, start your efficient and quality life here! | Cipher File Special Delivery III on social media |
| WRECK010 | There’s something strange under the bunk bed in the ship’s cabin. | Shallow Water Harbor - Deck Investigation Point (deck railing) |
| Xinjiga | Welcome to Xinjiga Island! Please check the supplies prepared for you (1/3): NUJRJRZP0E | Island Suspense Event Trailer + social media updates |
| XJG0930 | September 30. Did you just say September 30? That’s right! Today, let’s find out what event starts on that day. Here’s the thing: there’s indeed an event on September 30, but what is it? I’m also wondering. | Island Suspense Event Trailer + social media updates |
| ZS | There’s a mole, abort the deal! |
How to decipher encrypted codes in Tears of Themis Island Suspense
In order to decipher the encrypted codes, go to the Island Suspense event page in Tears of Themis. This can currently be accessed via the icon on the game’s main screen during the limited-time portion of the event, but will be permanently accessible from the X-Note > Events menu as well.
Image credit:VG247 / HoYoverse
From the event landing page, select the Terminal icon on the bottom left of the screen.
Choose Deciphering from the options given on this menu, then enter your cipher text into the text box and click Decrypt .
Image credit:VG247 / HoYoverse
If you’re having difficulty getting a cipher to register, try retyping it into the deciphering box yourself, as I’ve experienced some issues with copy+pasted text not being correctly registered by the game.
(Also be aware that — at least on Android devices like mine — your phone will probably get confused and try to save every cipher as a password; it’s annoying but you can safely just ignore it.)
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