In certain cases, Personal Data cannot be completely deleted in order to ensure the consistency of the gameplay experience or the Steam Community Market. For instance, matches you have played that affect other players' matchmaking data and scores will not be deleted; rather, your connection to these matches will be permanently anonymized. Please note that Valve is required to retain certain transactional data under statutory commercial and tax law for a period of up to ten (10) years. If you withdraw your consent on which a processing of your Personal Data or of the Personal Data of your child is based, we will delete your Personal Data or respectively the Personal Data of your child without undue delay to the extent that the collection and processing of the Personal Data was based on the withdrawn consent.
How long do you store my data for? 
retain certain transactional data under statutory commercial and tax law for a period of up to ten (10) years