Password for App Store showing as incorrect, but it is correct.

I am attempting to update my games, but my Apple ID is password keeps saying it is incorrect when I try to validate the download. It is not incorrect - I am signed into my device with the same password (I signed out and in again to verify this twice) and I also signed into the actual App Store with the same password successfully. Yet when I type the exact same password into the field when I attempt to update the game, it says incorrect password. This is very frustrating. I even changed my password to a new one and repeated the entire process: I signed out of all Apple ID things and signed back in with the new password. Same problem occurs: I succeed with the device sign in, I succeed at signing into the App Store, but when it asks for my password for the game download, it says the password is incorrect. Why???