How to Redeem Codes in Tower Defense Simulator
Updated August 2, 2026Short version: redeeming codes in Tower Defense Simulator is simple — open the Codes menu, type the code exactly as written, and press Redeem. This guide covers every step in detail, plus the errors players run into most.
Step-by-Step Redemption Guide
- 1. Open the Codes menu. Launch Tower Defense Simulator on Roblox, join or start a match, and click the Codes button on the in-game lobby screen.
- 2. Type the code exactly as written. Enter it into the text box with correct capitalization and no extra spaces — codes are usually case-sensitive, so copy-pasting from our codes list is safer than typing from memory.
- 3. Press Redeem. If the code is still active, the reward is added to your inventory or tower skin list immediately.
Common Code Errors
If you're still stuck after following the steps above for how to redeem codes in Tower Defense Simulator, it's almost always one of these causes. Here's how to tell them apart:
| What you see | Likely cause | What to do |
|---|---|---|
| Game says the code is invalid | Typo, wrong capitalization, or the code was never real | Copy-paste the code from our codes page instead of typing it from memory |
| Game says the code has expired | The code's event window has ended | Check our expired codes list to confirm, then look for what's currently active |
| Code accepted, but no reward appears | Skin codes only apply if you already own the base tower | Unlock or buy the required tower first (e.g. 2MILLION needs the Pursuit tower) |
| Game says the code was already redeemed | Codes are one-time per account, not per session | Nothing to fix — you've already claimed it on this account |
Keeping This Guide Accurate
We re-check the official Roblox game description and cross-reference third-party trackers regularly, so this guide to how to redeem codes in Tower Defense Simulator should stay accurate even as Paradoxum Games ships new codes. If a step above ever stops matching what you see in-game, it's worth checking whether Roblox itself has changed the Codes menu UI in a recent update.
FAQ
How do I redeem codes in Tower Defense Simulator?
In the game lobby, click the Codes button on screen, type the code exactly as written into the text box, then hit Redeem. If the code is valid and still active, the reward lands in your inventory or tower skin list immediately.
Do Tower Defense Simulator codes expire?
Yes. Our cross-check counted around 40 historical codes (such as JOHNRETURNS and MERRY2021) that at least two independent sources agree are expired. Codes are usually tied to a specific event window and stop working once the event ends.
Can I redeem a Tower Defense Simulator skin code without owning the tower?
No. Skin codes — like 2MILLION, which grants the Mercenary Pursuit skin — only work if your account already owns the tower the skin belongs to. Both Roblox Den and PCGamesN state this requirement explicitly on their codes pages.