You can use the code to get free rubies.
How to use ?
Open the game then tap the avatar on the top left> settings> redeem> enter code.
i will update the codes if i know new code
- TWDsCHALLENGE (case sensitive)
- SURVIVALKIT
- BESTTWDS
- TWDS400
- TWDXPO64
or
First you have to copy your ID. Open the game then tap the profile image then copy your game ID
then open the twd survivors official website . https://twd.elexapp.com/p/a/sendmail
Enter your character ID. then press the “send verification” button.
Open the game letter then you will see the verification message.
Open the message then click “click to go to the exchange rewards page”
Then enter the code
TWDXPO64
Open the game then check the letter