According to that email, the attackers compromised the following services:
Access to the Codemasters corporate website and sub-domains.
DiRT 3 VIP code redemption page
Access to the DiRT 3 VIP code redemption page.
The Codemasters EStore
Attackers gained access to, customer names and addresses, email addresses, telephone numbers, encrypted passwords and order history.
"Please note that no personal payment information was stored with Codemasters as we use external payment providers, meaning your payment details were not at risk from this intrusion."
Codemasters CodeM database
Members' names, usernames, screen names, email addresses, date of birth, encrypted passwords, newsletter preferences, any biographies entered by users, details of last site activity, IP addresses and Xbox Live Gamertags are all believed to have been compromised.
Codemasters can't confirm if the data was actually downloaded and stored to external medium, but it is very likely that the cyber criminals did get that data.
The Codemasters.com website will remain offline for the foreseeable future with all Codemasters.com traffic re-directed to the Codemasters Facebook page instead. A new website will launch later in the year.