You ever fall into one of those games that looks simple at first—just a few towers, a couple waves—and then suddenly it’s 1:30AM and you’re still trying to merge one more archer before the next boss hits? Yeah. King of Defense: Merge TD did that to me.
This tower defense mobile game (available on Android and iOS, by the way) has been quietly blowing up in the U.S. charts—and for good reason. It’s strategic, chaotic, and weirdly relaxing all at once. But here’s the thing most players miss: the game codes. Seriously, free Merge TD redeem codes can hand you in-game items, limited-time offers, and other free game rewards that speed up your progress without dropping cash.
If you’re playing free-to-play (like I usually do), these codes are your best friend. So, how do you find them? Where do you enter them? And—let’s be honest—are they even worth it?
Let’s get into exactly how to use King of Defense game codes…
Latest King Of Defense October Codes (Halloween 2025 Update)
Alright, so if you’re like me and you’ve been grinding King of Defense: Merge TD this fall, you know October’s not just spooky season—it’s also code season. And yep, Merge TD Halloween codes are actually solid this year (not just random coins and one arrow tower you already have five of).
Below’s a quick breakdown of the working codes I tested myself this week. I’ve added a bit of context so you’re not just copying and pasting blindly into the redeem center—some of these drop way more value than others, especially if you’re chasing limited-time Halloween event units or trying to stack up for those seasonal boss fights.
| Code | Reward | Expires | My Take |
|---|---|---|---|
| SPOOKYMERGE25 | 300 Gems + Pumpkin Cannon Skin | Oct 31, 2025 | Best seasonal code—don’t skip this, even if you’re F2P. |
| DEFENSEBOOST1025 | 2x XP Boost (1 hr) + 200 Coins | Nov 3, 2025 | Good for speed-farming early waves. I saved it for a long session. |
| HALLOWREWARDS | Random Epic Item + Hero Shards | Nov 1, 2025 | Bit of a gamble, but I pulled a rare relic I actually needed. |
| MERGETD2025 | 150 Gems | Dec 31, 2025 | Not Halloween-specific, but solid if you’re new or gem-starved. |
How to Redeem Codes in King Of Defense: Merge TD (Step-by-Step for Android & iOS)
So here’s the thing—redeeming codes in Merge TD isn’t rocket science… but it also isn’t as obvious as you’d expect. I’ve definitely fumbled with it before, especially when I was half-asleep scrolling through menus wondering, “Where the heck is this input box?” Anyway, here’s a simple walkthrough that works on both Android and iOS, with a few notes from my own trial-and-error moments.
🛠️ Step-by-step instructions:
- Launch the game and let it fully load. (I’ve rushed this before and it bugged out—wait for the main screen to finish animating.)
- Tap on the Settings icon (top-right corner of the main screen—looks like a little gear).
- In the pop-up menu, look for the “Redeem Code” button. It’s easy to miss if you’re skimming, but it’s usually near the bottom.
- Tap it, and a code input box should appear.
- Type or paste your code exactly. No extra spaces. (I once copied one from Discord with a trailing space and wondered why it didn’t work. Rookie mistake.)
- Hit the Confirm button and wait for the success message or the reward pop-up.
Now, if you get an error message, don’t panic—it usually means the code’s expired or already redeemed. Double-check spelling and timing. Some codes are limited-time only, especially around events like Halloween or Christmas.
Where to Find New King Of Defense: Merge TD Codes (Without Guesswork)
Alright, let’s be honest—finding new Merge TD codes isn’t always straightforward. The devs don’t always drop them where you’d expect, and I’ve definitely missed a few just because I wasn’t checking the right spots. If you’re like me and you hate missing bonus rewards just because you weren’t online at the right moment, here’s where you should actually be looking:
- Official Facebook Page – This one’s hit or miss, but during seasonal events, they’ll usually post a code in a promo image or in the comments (yep, I’ve found hidden codes in replies before).
- Twitter/X (@KingOfDefenseTD) – Good for quick updates, especially around patch notes or mobile event alerts. I’d recommend turning on notifications if you’re actively playing.
- Discord Server – Honestly, this is the goldmine. Not only do you get code drops early, but the mods and community usually pin the working ones. Plus, I’ve seen developer announcements here that never made it to social media.
- App Store + Google Play “What’s New” section – I know, nobody reads this anymore… but sometimes, they sneak a code into the update logs. I’ve found more than one there by accident.
- Reddit (r/gachagaming or r/MobileGaming) – Players will post codes and expiration dates. Just be wary of outdated threads; check the comments for updates.
