areas. A new space zone was also added. Other content added in this expansion included the ability to add cybernetic limbs to a player character and quests for two new creature mounts and three new starships. A substantial portion of the content for this expansion was adapted from the film Star Wars: Episode III – Revenge of the Sith which was released to theaters in the U.S. on May 19, two weeks after the expansion release. Other features included new starfighters, resource mining in space, and cybernetic limbs for player characters. The cybernetic limbs, however, were not due to the loss of an arm in combat. The player had to obtain the arm and then surgically attach it. Customers who purchased the expansion also received a limited-edition Varactyl pet as a player mount. Rage of the Wookiees expansion also added a few quests, one allowed the player to obtain a pet Bolotaur after going through several tasks. The Bolotaur is similar to the Veractyl but larger and brown. Gameplay mechanics for combat and armor/weapon systems received a major alteration on April 27, 2005, when SOE released the Combat Upgrade that replaced a system that allowed players with combat professions to stack defensive abilities from various skill sets, while also fixing an exploit that allowed players to have their character attack freshly spawning non-player characters (NPC) and creatures while away from their computers in order to gain combat skill experience. The reviews for the second expansion, Rage of the Wookiees, lauded the new quest content for current subscribers but lamented the combat gameplay updates and the continued bugginess of the game. Trials of Obi-Wan The third expansion, Star Wars Galaxies: Trials of Obi-Wan''', was announced on August 19, 2005, and released on November 1, 2005. This expansion added the ground planet of Mustafar to the game. No new space sector was added with this expansion. Like the previous expansion, much of the content is related to Revenge of the Sith, which was released to DVD on the same day as the expansion was released. Additional content, including the presence of the droid HK-47, is based on the Knights of the Old Republic games. One week after this release the entire character development process was changed in the New Game Enhancements (NGE). Major changes included the reduction and simplification of professions, simplification of gameplay mechanics, and Jedi becoming a starting profession. This