Ensure the game is a direct digital code, not a "gift card" for another console's store.
You cannot use an Amazon gift card to purchase digital codes for other storefronts like the Nintendo eShop , PlayStation Store , or Steam . can you buy digital games on amazon with gift card
Add the gift card to your account balance first. Ensure the game is a direct digital code,
You can use your gift card balance for full digital games that are sold directly as a "Digital Code" on Amazon. You can use your gift card balance for
Virtual currencies (like V-Bucks or Roblox Robux) are generally ineligible for purchase with an Amazon gift card balance. How to Use Your Balance
During checkout, the gift card balance should automatically be selected as the primary payment method. If it doesn't appear, you may need to add a backup credit or debit card to your account to satisfy Amazon's "1-Click" digital purchase requirements.
Amazon gift cards are eligible for most other digital goods, including Kindle eBooks , Prime Video movies , and digital music . What You Cannot Buy