Steps to buy google play credits (increase your google play balance)
https://support.google.com/googleplay/answer/3423011?co=GENIE.Platform%3DAndroid&hl=en
Step 3 was added myself

Using an Android phone you can pay for games on Stadia. It can be part of the price as well, so no need to buy additional credit.
Is that through the app? Does it matter if the games is on sale? I was looking at Avengers but it wouldn't let me select the Google Play balance.
Hi, @GameOrNought, it is through the app and for games on sale you can not do partial payments unfortunately. you can fill your google play balance up to be above the amount you need so you are technically still doing partial payments. Part of your balance came from your gift card the rest came from your normal payment method
-Shadow
Just a volunteer here on the forums
Great tip!
How do you add funds to your Play balance?
Steps to buy google play credits (increase your google play balance)
https://support.google.com/googleplay/answer/3423011?co=GENIE.Platform%3DAndroid&hl=en
Step 3 was added myself
