Cary-based Epic Games shutdown its forums after a hacker security breach Tuesday.

The company, which developed best-selling games such as Infinity Blade, Gears of War, and Unreal Tournament, was bought by Chinese tech firm Tencent Holdings. It advises those who may be affected to change their username and password as soon as possible. While it doesn’t maintain any hackable financial information, the company said, it nevertheless warned users to beware of any phishing attempts or other suspicious activity.

In addition to its games, Epic is also well known for its widely used Unreal Engine technology.

Epic sent email to its forum members saying that unknown hackers may have accessed their user names, passwords, and birthdates.

Affected channels, according to Epic’s message to users, included Bulletstorm, Gears of War, Infinity Blade, UDK, and older Unreal Tournament games. It added that the separate forum sites covering Unreal Engine 4, Fortnite and the new Unreal Tournament were unaffected.

This is just the latest in an increasing series of hacks on giant retailers, government agencies, and even sophisticated technology companies.