Epic Games’ Unreal Engine and Unreal Tournament forums have been compromised by an unknown hacker or a group of hackers. Hackers have stolen more than 800,000 forum accounts with over half a Million from the Unreal Engine’s forums alone. Users of Infinity Blade, UDK, Gears of War, and older Unreal Tournament games are at risk from the breach. LeakedSource, a search engine site that indexes leaked login credentials from data breaches, has added the breached data from the Epic Games forums into its database to allow users to search for their stolen data.
Source: https://thehackernews.com/2016/08/game-forum-hacked.html