Account information belonging to 569,703 players of the Mortal Online massively multiplayer online role-playing game (MMORPG) has been sold online several times since it was leaked as a result of a data breach. An unauthorized third party accessed a server holding shop and forum databases, and pilfered the data. The Mortal Online database has been added recently to Troy Hunt’s Have I Been Pwned collection, provided by Adam Davies, data analyst and security researcher. The information passed through several hands and was even tried on other game accounts, belonging to League Of Legends players.
Source: https://www.bleepingcomputer.com/news/security/cracked-logins-of-570-000-mortal-online-players-sold-on-forums/