How redemption works
Devsisters titles usually redeem codes on a web coupon page, not inside the game. Crumble is expected to follow the CookieRun: Kingdom pattern:
- Find your DevPlay email in the in-game Settings menu.
- Visit the official coupon page (URL confirmed at the 30 July launch).
- Enter your email and the code exactly as published.
- Collect rewards from your in-game Mailbox after logging in.
Active codes
No public Crumble codes exist before launch. Any list claiming otherwise is guessing. The pre-registration Treasure Map event is the one confirmed source of official secret codes right now.