It can take years for players to accrue wealth and skills through a series of challenges from fighting goblins to activities such as fishing, farming and mining.
Police believe the hacker obtained password details through a so-called phishing scam where a fake internet page tricks users into handing over their personal information.
The boys were taking part in Rune Scape, a medieval fantasy game which has more than 100million players worldwide.
It revolves around collecting gold coins which characters can use to buy magic potions, spells and weapons in a world of dungeons and dragons.
A ritual must take place, but she needs three items: a brain, body and blood. Zu Zu asks the player for help to travel to Keening Reef where she will find the second item for the ritual: the body.
She needs part of the reef, which is created by the bodies of dead sea creatures.
The most popular characters chosen by players are wizards, rangers and fighters, while the most feared monster is the corporeal beast, which eats souls.
He was arrested last Tuesday in the Avon and Somerset area and accepted a police caution for hacking into 284 accounts. It is free to anyone over the age of 13, although players have to pay £5 a month if they want more conquests and skills.
After being rescued, Zu Zu complains that the villagers were so unimaginative that she'd had to suggest different ways that they could try to kill her, to no avail.
At the end of the meeting, she suggests meeting to discuss her death.
One Rune Scape account was recently sold on e Bay for £46,000.
However, the arrested hacker did not steal the accounts to sell on.
Zu Zu also mentions how once many occultists were put to death by the khans, fearing their powers, and that now the soothsayers want her dead.