1.58M accounts from Dungeons & Dragons Online (ddo.com) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Dates of birthEmail addressesIP addressesPasswordsUsernamesWebsite activity
In April 2013, the interactive video game Dungeons & Dragons Online suffered a data breach that exposed almost 1.6M players' accounts. The data was being actively traded on underground forums and included email addresses, birth dates and password hashes.
Source: Have I Been Pwned (CC BY 4.0)