In pictures: Online gamers unmasked

"Legends of Knights is one of many guilds that populate the Lineage game world in Korea.

Lee Hyun-Joon is the master of the guild. Every month he organises 600 people to help defend his virtual castle.

His avatar is riding the dragon (right). Around 20-30 of the top members will play together in the same cybercafe, shouting instructions and information to each other.

The rest are based elsewhere and communicate through the game, instant messaging and mobiles." (Robbie Cooper)