A post by S2 Games on the official Heroes of Newerth forums
confirms that the popular free-to-play MOBA game has been the victim of a recent cyber attack (thanks VG247
[UPDATED 3PM EST MONDAY] Security Issue: 12/16
At 2:30 PM EST we became aware that a Heroes of Newerth password security breach had occurred.
We encourage everyone to change any passwords that were shared with your Heroes of Newerth account. Do not change your Heroes of Newerth account password at this time.
Disregard any out-of-game sources of information at this time.
The game's servers have since been taken down, and restored for maintenance, and everyone with a Heroes of Newerth account should have now received a password reset notification.