Playing on Steam (including with a non-Steam version)
Full information here.
Registering your code to the right service account
To find out details about how to register your code to the right service account, please check this article.
Trying to make a payment and receiving an error 601 and/or 401?
If you are encountering such an error, please first confirm with your bank that there are no restrictions on your card for online transactions. For further information, please refer to this article.
|I cannot log in/have forgotten my ID or password||What is a "One-Time Password" /
SQEX security token?
|Billing and Payment||Changing your e-mail address or other account details|