Complex sentence: Lunarstorm officially opened on January 1,2000, after Lunarworks had taken over StajlPlejs and decided to rename it after the user name used at the website by Rickard Ericssons girlfriend.
Split into simpler sentences: Lunarstorm officially opened on January 1,2000, after Lunarworks had taken over StajlPlejs and decided to rename it. Lunarstorm was the user name used at the website by Rickard Ericssons girlfriend.