Grab the freshest working codes for free diamonds and rewards, plus a quick walkthrough on redeeming them inside the game.
Merge Tower Defense mixes tile-merging with wave-based tower defense, and the developer drops promo codes that hand you diamonds and other freebies you can pour straight into upgrades.
Working Merge Tower Defense Codes
Redeem these while they are still live — most codes have a short shelf life, so it pays to claim them early.
DAMAGERAID
Free in-game rewards
New
VOIDAWAKENING
1,000 Diamonds
New
SAFEGUARDPROTOCOL
500 Diamonds
New
dude
A stash of Diamonds
arcane
A stash of Diamonds
MTD1K
1,000 Diamonds
TY20M
1,000 Diamonds
Biotrix
500 Diamonds
HellGuard
500 Diamonds
Genesis
1,000 Diamonds
Corruptor
500 Diamonds
Aegis
500 Diamonds
Happy Halloween
1,000 Diamonds
UPD6.0
1,000 Diamonds
Welcome
500 Diamonds
DiscordMembers
1,000 Diamonds
Note: codes are case-sensitive. Type them in exactly as shown, including any capital letters and spaces.
How to redeem codes in Merge Tower Defense
Redemption takes less than a minute once you know where the code box lives. Follow these steps in order.
Step 1: Launch Merge Tower Defense and wait for the main lobby to finish loading. You need to be past the initial tutorial before the code entry becomes available.
Step 2: Open the settings menu from the lobby, then look for the Twitter or code icon. Tapping it brings up the redeem window.
Step 3: Paste or type one of the working codes above into the text field, keeping the exact spelling and capitalization.
Step 4: Hit the confirm button. If the code is valid, a confirmation message appears and your diamonds land in your balance right away — check the top of the screen to verify the total went up.
How to get more Merge Tower Defense codes
New codes usually roll out alongside updates, milestone celebrations, and community events. The developer posts them through the game’s official Discord server and the in-game notification board, so joining the Discord is the fastest way to catch drops the moment they go live. Fresh batches tend to appear every few weeks, with bigger bundles saved for major patches.
Are Merge Tower Defense codes free?
Yes. Every code listed here is free to redeem and costs no Robux or in-game currency. The rewards are handed out by the developer as a thank-you to the community.
Why didn’t my code work?
The two usual causes are a typo or an expired code. Double-check the spelling and capitalization first, and if the game still rejects it, the code has most likely reached its expiry window and is no longer redeemable.
Bookmark this page and swing by after each Merge Tower Defense update — we refresh the list as soon as new codes drop and clear out ones that stop working.
