Buy Diamonds in UNDECEMBER by Account Login

UNDECEMBER is an isometric hack-and-slash action RPG developed by Needs Games and published by LINE Games. It first launched in South Korea in November 2021 and went live worldwide on October 12, 2022, on PC via Steam and the FLOOR launcher, as well as on iOS and Android. Built on Unreal Engine 4 with a dark-fantasy setting, it keeps your progress in sync across every platform through a single LINE Games account.

The heart of UNDECEMBER is its classless character system. Instead of locking into a preset class, you shape your build with hundreds of Skill Runes and Link Runes arranged on a hexagonal grid, then spend points in the Zodiac constellation tree. The New Age season rebalanced runes and expanded the endgame, which keeps UNDECEMBER among the top mobile ARPG alternatives to Diablo Immortal and Path of Exile for players who care about build freedom.

What Are Diamonds in UNDECEMBER

Diamonds are UNDECEMBER's premium currency, the one you buy with real money in the in-game store or pick up during major seasonal events. Rubies, by contrast, are the in-game currency you earn through everyday play. Diamonds are what fuel the store: inventory expansions, seasonal passes, cosmetic sets, and conversion into Rubies for trading on the Auction House.

What Diamonds are used for:

• Inventory expansions — Your default storage fills up fast around the mid-levels. Extra slots and storage tabs are bought with Diamonds and apply to your whole account, across every character.
• Premium seasonal pass — Unlocks upgraded rewards for completing seasonal tasks: rune materials, XP boosts, and limited-time cosmetics. The pass lasts for the current season.
• Conversion to Rubies — Diamonds can be exchanged for Rubies at a fixed rate. Rubies are the only currency the Auction House accepts, so this is how players buy and sell items with one another. That gives Diamonds a double role: direct purchases plus access to player trading.
• Cosmetic sets — Looks for your character, weapons, and pets. Cosmetics never change your stats.
• Convenience — Extra crafting queue slots, expanded auction features, and appearance changes.

Worth stressing: UNDECEMBER is not pay-to-win. Every rune, piece of gear, and material can be farmed in dungeons and raids. Diamonds save time and add comfort, but they don't hand you a real edge in PvP.

How to Buy Diamonds in UNDECEMBER at the Best Price

Topping up takes five steps and usually wraps up within 20 to 40 minutes.

Step 1 — Pick a Package in the Catalog

On the UNDECEMBER page at Ashop you'll find four Diamond packages: 455, 1,180, 2,120, and 4,260. Each one comes in two versions tied to your login type, Facebook or Google. Pick the version that matches how you sign in to the game: choose Google if you log in with Google, or Facebook if you log in with Facebook.

The price per Diamond drops as the package grows, so the 4,260 pack gives you the best value per unit. If you're planning more than one purchase (say, a seasonal pass plus an inventory expansion), one large package costs less than several small ones.

Step 2 — Provide Your Account Login Details

LINE Games doesn't offer a public API for crediting Diamonds to a third-party ID, so delivery runs through account login. The operator briefly signs in to the Facebook or Google account tied to your UNDECEMBER profile, opens the game, buys the package you chose in the in-game store using our infrastructure, and signs out.

When you place the order, enter the login and password for the Facebook or Google account you use for UNDECEMBER. These details are used for a single sign-in and package activation, nothing more. There's more on safety below.

Step 3 — Place the Order and Add Contact Details

Enter your email so we can send order status updates. Double-check your login before paying, since a single typo can block delivery. If you have two-factor authentication on your Google or Facebook account, be ready to approve the sign-in on a second device.

Step 4 — Pay With Your Preferred Method

Available payment methods:

• Bank cards (MIR, Visa, Mastercard from Russian banks)
• SBP (Fast Payment System) through any banking app
• Cryptocurrency — USDT (TRC20, ERC20), BTC, ETH

Once your payment clears, the order goes to the operator for processing.

Step 5 — Receive Your Diamonds In-Game

The operator signs in to the Facebook or Google account you provided, opens UNDECEMBER, activates your package in the in-game store, and signs out. The Diamonds land on your character's balance as soon as the purchase is confirmed. The order is marked "completed," and you'll get an email notification.

After your Diamonds arrive, we recommend changing your Facebook or Google password. That's standard practice any time someone has temporary access to your account.

Payment Methods at Ashop

Ashop accepts only the methods that work for Russian players in 2026. No foreign cards, international payment accounts, or VPNs needed.

Bank Card (MIR, Visa, Mastercard)

Cards from Russian banks on the MIR system are accepted without restrictions. Visa and Mastercard cards issued by Russian banks go through the same way. This is the most common option for players in Russia.

SBP (Fast Payment System)

Pay by QR code or payment link through any banking app connected to SBP, which covers nearly every Russian bank: Sberbank, T-Bank, Alfa-Bank, VTB, Raiffeisen, Gazprombank, and more. No separate card required, just a banking app with a linked account.

Cryptocurrency (USDT, BTC, ETH)

If you hold crypto, you can pay in USDT (the main option, supported on TRC20 and ERC20), Bitcoin, or Ethereum. It's a handy choice for players in Belarus, Kazakhstan, and other CIS countries, as well as anyone who'd rather skip bank cards.

The full list of methods appears on the payment page once you've selected a Diamond package.

Is Top-Up via Login Safe?

Diamond delivery for UNDECEMBER runs on a login flow: the operator briefly accesses your Facebook or Google account to make the purchase through the in-game store. This comes down to the publisher's setup, since LINE Games doesn't publish a UID API for crediting Diamonds directly from third-party services. The only way to pay for a package is to sign in to the account and complete the purchase inside UNDECEMBER's store.

What the operator does during delivery:

• Signs in to the Facebook or Google account you provided, one time
• Opens UNDECEMBER and starts the purchase of your chosen Diamond package in the in-game store
• Completes the payment through our infrastructure and confirms the Diamonds are credited
• Signs out of the account on our side

What the operator does not and cannot do:

• Does not store your credentials after the order is done
• Does not touch bank cards linked to Google Pay or Facebook Pay — payment runs through Ashop in rubles, not your account funds
• Cannot change the account email, transfer the LINE Games account, or take your progress — those actions require verification through the primary email and two-factor authentication

Safety tips:

• Once you get the completion notice, open your Facebook or Google settings and change your password
• If two-factor authentication is on, be ready to approve the sign-in on a second device during delivery
• Check your Diamond balance in UNDECEMBER; the package should show on your character right after delivery
• If you keep a backup email and security questions, make sure they're current

If anything goes sideways, reach Ashop support on Telegram and the operator will sort it out for your specific order.

What to Spend Diamonds On in UNDECEMBER

Where your Diamonds go best depends on where you are in the game.

Beginners (up to Act 5)

Early on, inventory expansions pay off most. Your backpack and storage fill quickly with runes and gear, and dropped loot slows you down. Extra storage tabs are a one-time Diamond purchase that stays on your account for good. That lets you comfortably collect runes for your chosen archetype (Strength, Dexterity, or Intelligence) without selling items you'd rather keep.

Active Players (mid-game to endgame)

Active players get the most from the seasonal premium pass. It pays for itself if you play three or four times a week, with upgraded rewards for seasonal tasks: rune upgrade materials, XP boosts, and limited cosmetics. It's also worth converting some Diamonds to Rubies for the Auction House, since top-tier runes and rare items are often easier to buy from other players than to farm from scratch.

Hardcore Players (Chaos Dungeons, 8-player raids, PvP arena)

Hardcore players should look at the large 4,260 Diamond pack for the best price per unit. Diamonds here go toward full material sets for pushing Skill Runes and Link Runes to max level, each season's premium pass, and cosmetics for that status look. Some Diamonds, converted to Rubies, cover Auction House buys for the specialized runes a specific build needs.

Seasonal Events

UNDECEMBER runs regular events that refund part of your spent Diamonds as bonus Rubies or seasonal materials. If a big purchase is on your mind, check the official LINE Games news for active promotions first.

Why Top Up at Ashop

Ashop runs as an independent top-up service for Russian players who've lost direct access through Google Play, the App Store, and FLOOR since 2022.

• Pay in rubles — MIR card, SBP via a banking app, or crypto. No foreign cards or overseas accounts needed.
• All four Diamond packages in the catalog — 455, 1,180, 2,120, and 4,260 — each in Facebook and Google login versions.
• Cross-platform delivery — Diamonds credit to your LINE Games account and show up on every version: iOS, Android, and PC via Steam or FLOOR.
• 24/7 Telegram support — operators help you pick a package, check order status, or resolve a specific issue.
• A transparent process — the login flow is spelled out, a password change is recommended in the steps, and you get status updates by email.
• An alternative to the official store — Ashop isn't affiliated with Needs Games or LINE Games. It's a working ruble payment channel for players cut off from direct app-store access.

Frequently Asked Questions (FAQ)

Answers to the questions players ask most about topping up Diamonds in UNDECEMBER through Ashop. If yours isn't here, reach out to Telegram support.