H1Z1 developer Daybreak Game Company is reporting intermittent and ongoing distributed denial-of-service (DDOS) attacks against its game servers, forums and website in the wake of public complaints made by CEO John Smedley about a specific hacker.
The hacker Smedley spoke out against, Julius Kivimaki, was recently found guilty of committing over 50,000 "aggravated computer break-ins" by a Finnish court and given a commuted sentence.
Kivimaki has previously affilliated himself with the Lizard Squad hacker group, which has claimed responsibility for (among other things) taking down the PlayStation Network for a few days last summer.
The group has now claimed responsibility for attacks against Daybreak, as you can see from the selection of Twitter posts captured and republished below.
This is well-worn territory for Daybreak; it suffered similar attacks back in February that Lizard Squad also owned up to, and last year the group claimed to be responsible for the grounding of a plane that Smedley was aboard.