Four working codes are live in Universal Tower Defense X right now, and the haul is genuinely worth stopping for. The latest batch drops up to 10,000 Gems, stacks of Trait Rerolls, and one code even hands over a free Prodigy Mage unit outright.
What the current codes actually give you
As of April 17, 2026, there are four active codes in Universal Tower Defense X, the Roblox anime tower defense game where players build squads of heroes drawn from Naruto, One Piece, Dragon Ball Z, and more to hold off endless enemy waves.
Here is the full list of working codes right now:
The key here is that ThankYouForUTDX! and WeLoveFern! are the two you want to prioritize. The first gives the biggest raw Gem payout, while the second is the only code currently offering a free unit alongside crafting materials.
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Codes in Universal Tower Defense X expire without warning. Redeem all four now before they rotate out, the expired list already runs to over 50 codes.
How redeeming works in UTD X
The process is straightforward. Launch Universal Tower Defense X on Roblox, then look for the Codes button on the right side of the main screen. Tap it, type your code into the text field exactly as written (including the exclamation mark where present), and hit Redeem.
New codes are typically announced first on the game's official Discord server, so that is the fastest place to catch them before they expire. The game was previously known simply as Universal Tower Defense before rebranding to the current UTD X format.
Where the Gems actually go
Gems in Universal Tower Defense X feed directly into the Summon system, which is how players unlock new anime-inspired units. Better units mean stronger defenses across the game's wave-based levels, so stacking Gems early gives newer players a meaningful head start on building a competitive roster.
Trait Rerolls and Relic Rerolls are the other half of the equation. These let players reroll the passive bonuses attached to their units and equipment, which matters a lot at higher difficulty tiers where raw unit strength alone stops being enough.
For players who want to go deeper into building the best possible squad, browse more guides on our site covering Roblox titles and beyond. The expired code list for UTD X already stretches back to the game's early access launch, which gives some sense of how frequently the developers have been dropping community rewards since release.
All four codes are confirmed working as of this week. If any stop working before you get to them, the game's Discord server is the first place new replacements tend to surface.
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