In July 2016, the now defunct free online games list website OnRPG suffered a data breach that was later redistributed as part of a larger corpus of data. The incident exposed just over 1M email and IP addresses alongside usernames and passwords stored as salted MD5 hashes.
Source: HaveIBeenpwned
Source Link: https://haveibeenpwned.com/PwnedWebsites#OnRPG