Entropia Universe is having an event featuring an alien invasion. An invading army of alient space robots will attack a player defended planet. You can earn up to three times the normal skill experience fighting off this invasion and all professions receive the bonus.

Video of the Robot Alien Invasion in Entropia Universe:
Entropia Universe Video: You’re Going to Need Some Weapons to Fight Off Those Alien Scum
Robot Attacks on Zychion Citadel
You can participate between December 5, 2008 and December 21, 2008. 15 complete sets of the Protector of the Empire armor are up for grabs protecting Calypso, Crystal Palace, and Club Neverdie.
Entropia Universe is preparing to switch over to a new graphichs engine in 2009 CryENGINE®2
Video of EU CryEngine 2:
About EntropiaUniverse
Entropia Universe is a MMO that is free to play running on micropayments. It is run by MindArk and was released in January of 2003. Over seven hundred thousand registered players in over two hundred countries play the game (although only about eighty thousand are active players).
Gameplay Combat Video
Entropia Universe is famous for selling overly expensive virtual world items. In 2008 the Guinness Book of World Records noted Club Neverdie space resort was sold for $100,000 (real money people). It is now estimated worth one million dollars. Virtual Shopping Malls, Virtual Banks, Land, and Items regularly sell in the tens of thousands of dollars.
You can customize your character including hair, eyes, body, and selecting the character model for your avatar.

