You can get the following:
- Borderlands 3: 10 golden keys & 1 diamond key
- Borderlands 2: 10 golden keys
- Tiny Tina’s Wonderlands: 10 skeleton keys
By entering the following code:
On the developer’s website here: https://shift.gearboxsoftware.com/rewards.
- Once you enter the code, you will see a screen asking what you want to redeem, and on which platform.
- You can redeem each item on every platform once. (So you can redeem 10 BL2 keys on Steam, PSN, Xbox, and Epic).
- Just re-enter the code again to claim another reward / on another platform.