S2Games has announced that they have been made aware of a security breach in Heroes of Newerth. According to the dev team, the breach allowed access to password information on user accounts and they are advising players to change passwords. In addition, the team announced that they had upgraded all security measures in the intervening day since the breach.
Additionally, while the game was down we upgraded all security systems. The game is back up and all HoN accounts will be prompted to create a new password. All passwords will be expired upon next login. However, we do want to reiterate that those who used the same password for HoN to access anything else to change their passwords.
We take security very seriously. Players must know their sensitive information is secure and S2 will ensure this is the case, no matter the effort or cost.
Read the full announcement on the Heroes of Newerth site.