Roblox has been a blind spot for me for years, but now that I've played it for myself, I totally understand its appeal.

Open Desert Detectors on the Roblox app on your PC, tablet, or mobile device. Click on the Menu button near the top of the screen. Scroll down until you find the Codes section of the menu.

Follow these steps: Launch Attack on Titan Revolution in the Roblox app on your PC, tablet, or mobile device. Once you load into the main menu, tap Codes.