Ultimate Tower Defense codes (December 2025)

Roblox‘s Ultimate Tower Defense codes hand out free in-game rewards to boost your progress, from gold and gems to rerolls, souls, and even exclusive chests.

These bonuses help you strengthen your roster, unlock rarer units, and get through tougher waves more efficiently. As you keep playing, you’ll face bigger challenges and events, which is where redeem codes come in handy.

Developer Ghostworks tends to drop them during updates, milestones, or seasonal celebrations, giving you a chance to claim limited-time perks without spending your resources. So, here’s everything available right now and how to redeem them all.

Updated December 15, 2025, to add one new code.

Active codes in UTD

There are currently six codes available to redeem in UTD, all of which we’ve redeemed in-game and can confirm are active at the time of writing:

How to redeem codes

In order to redeem the above codes, you’ll need to ensure that you follow this list of short steps:

1. Log in to Ultimate Tower Defense in Roblox by pressing the green launch button.
2. Click the blue Twitter icon in the bottom left corner of the screen, as shown in the image below.
3. Type in your desired code.
4. Press ‘Redeem’ to activate the code.
5. If successful, a notification will appear showing your rewards.

Ghostworks / Screenshot captured by Dexerto

Expired codes list

What are codes used for in Ultimate Tower Defense?

Promo codes exist in most Roblox worlds, but in Ultimate Tower Defense, they are used to unlock rewards such as Gems, Gold, and Towers. Gems and Gold are used as experience points and in-game currency, but Towers are special one-off events that allow players to chase even more lovely loot.

If you’re looking for more free redeemable items, check out our pages for Blox Fruits codes, Grow a Garden codes, Goalbound codes, Pokemon Bronze Forever codes, and Slayers Unleashed codes.