What is reported right now?
Current community code guides list 13 verified active codes (MMMPIZZA, TRADING, TRAITS+SECRETS, RETRO, FREETIX, NEW, TELAMON, DUSEKKAR, 1X1X1X1, BLOXXER, V3RT, GULLIBLE, JOHNDOE) and 7 additional codes flagged [CONFLICT] / [INSUFFICIENT DATA]. The codes page labels every entry with its verification tier and last-verified date.
How to redeem codes
Open Retro Tower Defense, tap the Inventory button on the left of the screen, click the gift box (gift card) icon in the top-right of the Inventory window, type the code exactly as shown, then click Redeem. If nothing happens, recheck capitalization, account requirements, previous redemption, and whether you are on a fresh server.
Why code status changes
Codes can expire or be replaced during updates. Recheck this page and the official Roblox experience before spending time or currency based on an old reward post.