Anarchy Online: Alien Invasion (0)

Most of the content in Alien Invasion is centered around player organizations. It introduced "City Plots", which organizations can purchase to erect their own cities. The favorable effects of these cities are; new mission, skill bonuses, access to unique equipment, and new places to organize role-play events. 
The expansion pack also contained a new starter area, an extended perk system and a new user interface.