Universal Tower Defense doesn’t punish you early, which is why many players burn through rewards without realizing it. Gems feel generous at first, rerolls seem endless, and upgrades appear cheap. That illusion disappears fast once the difficulty spikes.
Codes can help a lot, but only if they’re used at the right moment. Redeeming everything the second you see it often leads to wasted rerolls, poorly upgraded towers, and slower progression overall. The same codes can feel powerful or completely useless depending on when you use them.
This guide doesn’t just list active Universal Tower Defense codes. It explains when to redeem them, what to spend them on, and which players benefit the most right now, so you don’t accidentally sabotage your own progress.
Who Should Use These Codes Right Now?
These codes are most useful if you fall into one of the groups below:
- New players unlocking their first strong damage or support tower
- Mid-game players farming gems for trait optimization
- Players stuck clearing later story stages or infinite mode waves
- Free-to-play users trying to avoid unnecessary grind
If you already have a fully optimized late-game loadout, most codes offer diminishing returns unless saved strategically.
Active Universal Tower Defense Codes (Updated)
Here are all the currently working Universal Tower Defense codes, along with who should actually redeem them. Some codes are locked behind levels or Early Access, so timing matters.
- HereyougoEA! – 2,000 Gems, 20 Trait Rerolls, 5 Stat Locks
Early Access only. This is best saved for players who already understand trait value. Stat locks are wasted early. - ThankYou100k – 100 Trait Rerolls
Requires Level 50. Extremely valuable for late-game players optimizing endgame towers. Do not rush these. - ThousandsOfCodes! – 800 Gems, 15 Trait Rerolls
Requires Level 5. A strong mid-game code that works best once you’ve chosen a main carry unit. - MaxedOut! – 600 Gems, 10 Trait Rerolls
Requires Level 5. Useful for players transitioning out of early game and preparing for harder stages. - SixSeven! – 67 Trait Rerolls
Requires Level 15. Ideal for players who already know which traits they want to chase. - FixingBugs! – 450 Gems, 25 Trait Rerolls
A flexible code that benefits both mid-game and late-game players when used carefully. - 75kLikes! – 400 Gems, 10 Trait Rerolls
Best stacked with other gem codes before committing to upgrades or pulls. - NumberOne! – 500 Gems, 15 Trait Rerolls
Solid all-around reward, especially useful if you’re preparing for a progression push. - Universal! – 450 Gems, 15 Trait Rerolls
Good value for mid-game players who need both resources without heavy restrictions. - Mainstream! – 450 Gems, 15 Trait Rerolls
Works well when combined with other reroll-heavy codes for focused optimization sessions. - ThankYouUTD! – 400 Gems, 5 Trait Rerolls
Small but useful, especially if you’re just short of a needed upgrade. - RELEASE! – 400 Gems
Simple gem boost. Best saved until you know exactly what you’re upgrading. - THANKYOU! – 400 Gems
Identical use case to RELEASE!. Stack before spending. - UNRIVALED! – 200 Gems, 5 Trait Rerolls
Lower value than most, but still worth holding until you have a clear plan.
Best Way to Use Universal Tower Defense Codes
If you want maximum impact from these rewards, follow this approach:
- Delay reroll usage until you have a tower that stays relevant beyond early stages
- Stack gem codes and spend them in one focused session instead of piecemeal upgrades
- Prioritize scaling towers, not flashy early damage units
- Avoid experimenting blindly with rerolls until you understand trait synergy
Players who follow this method progress noticeably faster than those who redeem codes immediately.
How to Redeem Codes in Universal Tower Defense
Redeeming codes is quick and simple:
- Launch Universal Tower Defense
- Click the Codes button on the main screen
- Enter a working code exactly as shown
- Confirm to receive your rewards instantly
If a code fails, it has likely expired or already been redeemed on your account.
Expired Universal Tower Defense Codes
The following codes no longer work:
ThankYouEA!, 40kCCU!, SorryEA!, SorryEA2!
These are kept here to prevent confusion if you see them mentioned elsewhere.
How to Get More Universal Tower Defense Codes
The most reliable source is the official Universal Tower Defense Discord server. Developers usually share codes there during updates or milestones.
That said, Discord can be noisy. Codes are not always pinned or placed in a single channel, which makes hunting them down annoying.
Are Universal Tower Defense Codes Worth Saving?
In most cases, yes. Codes that offer rerolls or large gem rewards gain value the longer you wait, especially once you understand which towers and traits matter long-term.
Redeeming everything early feels good short-term but often leads to slower overall progress. Strategic timing makes a bigger difference than the number of codes you use.
Final Thoughts
Universal Tower Defense codes are not rare, but smart usage is. Treating them as progression tools instead of free bonuses changes how fast you move through the game.
If you’re stuck, low on resources, or unsure where your upgrades went wrong, chances are the issue isn’t bad luck. It’s timing.
Use codes with intent, not impulse, and the game becomes much more forgiving.
