Merge Tower Defense Codes (December 2025)

Merge Tower Defense uses codes to award free Diamonds, which you can spend on premium crates, new turrets, and upgrades.

Updated: December 10, 2025.

New codes: dude, arcane, UPD6.0

dude — Diamonds NEW
arcane — Diamonds NEW
UPD6.0 — 1,000 Diamonds NEW
Happy Halloween — 1,000 Diamonds
Aegis — 500 Diamonds
Corruptor — 500 Diamonds
Genesis — 1,000 Diamonds
HellGuard — 500 Diamonds
Biotrix — 500 Diamonds
MTD1K — 1,000 Diamonds
TY20M — 1,000 Diamonds
Welcome — 500 Diamonds
DiscordMembers — 1,000 Diamonds

How to redeem codes

Open Roblox on your device and launch Merge Tower Defense from its game page.

Once you are in a match or in the lobby, look to the top-right corner of the screen and click the ABX button that opens the Codes window.

Click inside the “Redeem a Code” text box, then carefully type or paste one of the working codes from the list above.

Press the Redeem button below the text box and wait a moment for the success message to appear.

If the code is valid and unused, Diamonds will be added to your account balance immediately; repeat the steps for each remaining code.

Expired codes

— There are currently no confirmed expired codes.

Why codes might not work

The code has expired. Many event or celebration codes only work for a limited time, then stop giving rewards.
There is a typo or extra space. Codes in Merge Tower Defense are case-sensitive, so any wrong letter, missing character, or added space will cause an error.
The code was already redeemed on your Roblox account. Most codes can only be used once per account.
The game client is out of date or the session bugged. Closing Roblox, reopening the game, and trying again can fix some redemption issues.

Where to find more codes

New Merge Tower Defense codes are usually shared around updates, milestones, and events. Check these official places for the latest drops:

The official Merge Tower Defense Roblox game page, which can feature new code announcements in its description.
The Merge Empire Roblox group listed on the game page, where group posts can include fresh codes.
The official Merge Tower Defense Discord server, especially announcement and update channels.

Bookmark this page — code lists here are reviewed regularly so you can claim new Diamonds quickly.

Remember that Merge Tower Defense codes are free, case-sensitive, and time-limited. Always enter them exactly as shown and avoid any third-party “code generators” or sites that ask for your Roblox password, since real codes only come from the game’s official channels.