Step 1 — Launch the experience

Open Retro Tower Defense on Roblox via the Plaything Games Universe ID 7738524573. Wait for your character to load in a fresh server.

Step 2 — Open Inventory

Tap the Inventory button on the left side of the screen. The Inventory window opens.

Step 3 — Tap the gift box icon

The gift box (gift card) icon sits in the top-right corner of the Inventory window. Tap it to open the code entry pop-up.

Step 4 — Enter the code

Type the code exactly as shown — capitalization matters (e.g. GULLIBLE vs gullible). Click Redeem.

Troubleshooting

If nothing happens: recheck capitalization, verify the code is still active, ensure you are not on a private server, and reload the experience.