The Guild Wars Website has more on the promised fourth anniversary content for ArenaNet's online RPG. The article has extensive details on a number of new and improved features, with each feature also getting a sub-page with even more images and details. The game's fourth anniversary is April 28, and the celebrations are now underway to lead up to the date. On a related note, ArenaNet announces that sales of Guild Wars has now surpassed the six million unit milestone.