The "3.5 Anniversary Eve Secret Box" in The Seven Deadly Sins: Grand Cross is a special event item that requires specific community-revealed codes to unlock. These boxes were distributed via the in-game mailbox and functioned in a sequential chain, where opening one box granted the next one. Active 3.5 Anniversary Box Codes
To unlock all five anniversary boxes, you must enter the following codes in order: Box 1: 20221124 Box 2: GC3halffesta Box 3: fiatlux Box 4: Peccatum1866 Box 5: royalblood
For a step-by-step walkthrough of entering these codes to claim your anniversary rewards, check out this guide:
While the specific "35th Anniversary" likely refers to the 3.5th Anniversary Ultimate Festival
from late 2022, here is a breakdown of the codes that were historically used for those secret boxes and the latest 7th-anniversary rewards as of April 2026. 3.5th Anniversary Box Codes (Historical)
The 3.5th Anniversary featured a series of secret boxes that required specific text codes to open from your inventory. While many of these are now expired, these were the verified codes released during that event: GC3halffesta Peccatum1866 royalblood THE1ULTIMATE (Limited first-come, first-serve code) Netmarble Forums Current Working Codes (April 2026)
If you are looking for codes that work right now for the ongoing 7th Anniversary celebrations, try these active gift codes: 777OURSPRING
: Provides the "Our Seventh Spring Box" or 10 SSR Enhancement Potions. 777NIGHTMARE : Grants 77 SSR Evolution Pendants. 777INFINITE : Grants 100 Super Awakening Coins. 7DSTGS2025 : General anniversary rewards. LIGHTNDARK : Grants 30 Diamonds. How to Redeem Secret Boxes : Go to your , collect the item, then navigate to Item Storage . Select the Secret Box and enter the code. Standard Coupons : You can use the Official 7DS Coupon Page by entering your server and member code (PID).
To open the 3.5 Anniversary Secret Boxes The Seven Deadly Sins: Grand Cross
, you must enter specific codes directly into the box from your inventory. These codes were released throughout the celebration in November 2022 to unlock various rewards like evolution materials and gems. Netmarble Forums 3.5 Anniversary Box Codes
If you still have these boxes in your inventory, try the following codes to unlock them: — Standard box code. GC3halffesta — Anniversary festival code. 7ds grand cross 35 anniversary box code work
— Latin for "Let there be light," referencing Ultimate Escanor. Peccatum1866 — Case-sensitive code. royalblood — Theme-based code. Netmarble Forums How to Use the Codes
Follow these steps to redeem codes for secret boxes found in your mail: Open your Mailbox and collect the "Secret Box" item. at the bottom right. Item Storage Navigate to the Secret Box Enter the code in the pop-up window to open it. Troubleshooting Case Sensitivity:
Most codes are case-sensitive. If a code fails, try entering it exactly as shown above. App Refresh:
If a code is correct but won't work, some players recommend closing and reopening the app before trying again. Expiration:
While the boxes remain in your inventory, the event items or specific "coupon" codes (like THE1ULTIMATE
) typically have short, first-come, first-serve expiration periods. Netmarble Forums current 2026 codes for the latest event, or did you just find an in your inventory? Codes For The 3.5 Anniversary Box - The Seven Deadly Sins
The 3.5 Anniversary Box event in 7DS: Grand Cross was a special celebration that distributed limited-time "Secret Boxes" containing high-value rewards like Diamonds and Evolution Pendants. 3.5 Anniversary Secret Box Codes
The event featured five sequential secret boxes. To open them, you had to enter specific codes in the order they were released. Box 1: 20221124 Box 2: GC3halffesta Box 3: fiatlux Box 4: Peccatum1866 Box 5: royalblood
Important Note: These codes were tied to the 3.5 Anniversary Ultimate Festival which took place around November 2022. If you are a new player or have recently returned, these boxes may no longer be available in your mailbox as they were part of a time-sensitive event. How to Redeem Box Codes
If you still have these boxes in your inventory under the "1-Use" tab, follow these steps to open them: Navigate to your Item Storage. Select the 1-Use tab and find the specific anniversary box. The "3
Tap on the box and enter the corresponding code from the list above. Active 2026 Coupon Codes Codes For The 3.5 Anniversary Box - The Seven Deadly Sins
The Seven Deadly Sins: Grand Cross , the 3.5 Anniversary event (celebrated late 2022) featured a unique multi-stage reward system known as the Secret Box. Players received these boxes in their in-game mailbox, which required specific codes to unlock and claim premium items such as Diamonds and Evolution Pendants. Working 3.5 Anniversary Box Codes
To fully unlock the rewards, players had to enter five sequential codes. These codes often leaked early and were verified by the community on the Official Netmarble Forum: 20221124 (Unlocks Box 1) GC3halffesta (Unlocks Box 2) fiatlux (Unlocks Box 3) Peccatum1866 (Unlocks Box 4) royalblood (Unlocks Box 5)
Additionally, a first-come, first-serve coupon code, THE1ULTIMATE, was released during the festival to provide 3 SSR Evolution Pendants to the first 150,000 players who redeemed it. How to Use the Codes
The method for redeeming codes varies depending on your platform and the type of reward:
Secret Boxes (In-Game Inventory): If you already have the physical box item in your "1-Use" inventory tab, select the box to bring up a prompt where you can enter the specific secret code to open it.
Android/PC Coupon Page: Go to the Menu → Settings → Account tab, then click "Use" next to Redeem Coupon to enter standard alphanumeric codes.
iOS/Web Redemption: Since iOS doesn't always support in-game entry, players must use the Official 7DS Coupon Page. You will need your Netmarble ID (PID), which can be found in your player profile. Legacy vs. Active Codes
While the 3.5 Anniversary codes are legacy items, the game frequently releases new codes for current events, such as the 7th Anniversary countdown. Recent active codes identified in early 2026 include: 777OURSPRING (Provides a selection jewel for Hellb) 777infinite 777flame 777Nightmare
Are you trying to open an old box remaining in your inventory, or Did this guide help
It sounds like you're asking for a draft paper related to the 7 Deadly Sins: Grand Cross game, specifically regarding a "35th Anniversary Box Code" — likely a promotional code or product that exists or could exist.
However, please note: As of my current knowledge (and general gaming news), The Seven Deadly Sins: Grand Cross (global/JP/KR) has not officially released a "35th Anniversary Box" product. The game itself launched in 2019, and the Seven Deadly Sins manga/anime franchise is not 35 years old (it began in 2012). The "35th Anniversary" might refer to Kodansha Comics (publisher of Weekly Shōnen Magazine, founded 1959 – but that would be ~65+ years), or possibly a confusion with another franchise like Dragon Quest (35th anniversary was 2021).
Given this, I will draft a hypothetical / speculative academic-style paper analyzing how such a promotion could work, focusing on the mechanics, security, and economics of limited-edition box codes in gacha games. If you actually have a specific existing product in mind, please clarify and I will revise.
The font on the physical paper slips is notoriously small. Use a magnifier on your phone. Try swapping similar-looking characters.
To summarize how the 7ds grand cross 35 anniversary box code works: It was a single-use, region-locked, time-sensitive code included in a physical merchandise box sold during the Weekly Shōnen Magazine 35th anniversary. You had to enter it on Netmarble’s coupon portal within a specific window (which has now closed).
If you have a leftover card and it says "Code Expired" or "Invalid Region," there is no secret trick to revive it. Your best bet is to focus on the current in-game events, which are far more generous than that old box ever was.
Enjoy the game, and never pay for expired codes.
Did this guide help? Share it with your Guild members who are still holding onto old 2023 coupon cards.
If you were hoping the "35th anniversary box code" would give you a massive boost, don't worry. Grand Cross constantly throws diamonds at players. Instead of chasing a dead code, use these working methods:
Netmarble periodically updates their coupon system. Old campaign codes (like the 35th Anniversary) may have been moved to an archive portal. If the standard coupon page says "Code not found," search the official forums for an "Old Event Code Redemption" link.
Before troubleshooting the code, let's clarify the product. The Seven Deadly Sins: Grand Cross 35th Anniversary Box is a physical merchandise set celebrating the crossover between the game and the magazine’s anniversary. It typically includes:
The key is the digital redemption code printed on a card inside the sealed box.