Undertale Adventures TD Codes (August 2026)
Placing your favorite Undertale characters along a path and watching them fend off wave after wave of monsters is exactly what you’ll be doing in Undertale Adventures TD, a Roblox tower defense game built around leveling up units and unlocking traits to hit harder. As the enemies get nastier, you’ll want every edge you can find, and that’s where Undertale Adventures TD codes are worth grabbing for. They stock you up on rerolls, so you can chase the units and traits you actually want without grinding for them. Redeem the ones below while they’re still active, since codes like these tend to stop working sooner than you’d expect.
Quick Answer: There is 1 active code for Undertale Adventures TD right now. They’re case-sensitive, so copy them straight from the table.
Updated August 17, 2026. XMASUPDATE2025 is the newest code, checked today and confirmed live. Expired Undertale Adventures TD codes stay below for reference.
Working Undertale Adventures TD Codes
Below are the Undertale Adventures TD codes that work right now. Redeem early; most drop off within a few days.
| Code | Copy | Rewards |
|---|---|---|
XMASUPDATE2025NEW | Redeem code for rerolls |
How to Activate Undertale Adventures TD Codes
There is 1 way to redeem codes in Undertale Adventures TD:
Method 1: Redeem Undertale Adventures TD Codes
- Tap the Codes button located on the right side of the screen.
- Type a valid code into the Enter Code text box, then press the Enter/Return key on your keyboard.
- Receive your free code rewards right away if the code is still active.
- Otherwise, drop us a note in the comments!
Where to Get New Undertale Adventures TD Codes
The developers usually post fresh codes in the Side Productions Discord, which is where most of them surface before anywhere else. There’s no real pattern to when they drop, though, sometimes it’s tied to an update or a milestone, sometimes it’s just a random Tuesday for no reason I can figure out. Since we update this page daily, you can lean on it to catch anything you missed without scrolling through channel history yourself. Between the server and this list, you should be covered.
Expired Undertale Adventures TD Codes
7 expired codes — these no longer work. Listed for reference.
Show all 7 expired Undertale Adventures TD codes
| Expired Code | Was |
|---|---|
SORRYAFTERTALEDELAY | rerolls |
THANKYOU10kMEMBERS | freebies |
THANKYOU12MILLIONVISITS | 1 Magu, 1 Gun, 1 Justice Vial |
JUNE10UPDATE | Trait Rerolls, Soul Fragments, and more |
HOTLANDS2025 | |
WINTER2025 | |
WELOVEUAPLAYERS |
What are Rerolls used for in Undertale Adventures TD?
Since your units grow stronger by unlocking special traits, Rerolls let you take another shot at getting a better trait roll instead of settling for a weak one. Codes that hand out free Rerolls are handy early on when you’re still trying to lock in good traits before the harder monster waves.
How do you redeem Undertale Adventures TD codes?
Look for the codes or Twitter/gift option in the game’s menu, paste a code in exactly as shown, and confirm to claim rewards like Rerolls and Fragments. Codes are usually case-sensitive, so it’s safest to copy and paste them to avoid typos.
