Punishing: Gray Raven codes

1. 1
   Finish the tutorial and reach the main screen.
2. 2
   Open the gift code box from the main screen (it's reached through your Commandant profile in the top left).
3. 3
   Paste the code and tap Use.
4. 4
   Rewards arrive in your in-game mail.

Each code works once per account. Some codes only work on the Taiwan server; this page lists global codes only.