Clone trooper film series and in the "Star Wars" expanded universe media, a number of specialized trooper units are seen, including elite special forces units such as the 'Advanced Reconnaissance Commandos' (ARC troopers), and Null ARCs, who usually work alone. All clone commandos and ARCs were trained by Mandalorian mercenaries; the elite Clone Troopers are known as Shadow Troopers. The style and color of a clone troopers armor often varies depending on their rank, specialization, unit, or environment, for example, the clone troopers on Kashyyyk wear camouflage green scout-style armour whereas the 501st legion wears standard white armor with blue accents. Another
Star Wars Roleplaying Game (Wizards of the Coast) can choose to specialize as a Jedi Healer, while a blaster-wielding mercenary might earn a reputation as a Bounty Hunter. The core rulebook includes the Jedi Master, Jedi Ace, Crime lord, Elite Trooper, Starship Ace, Officer, Darkside Marauder, and Darkside Devotee. Supplements to the core rulebook introduce many more prestige classes. Saga edition changed things around and made Force Adept a prestige class. The following books are available for the original edition. The following books are available for the revised edition. On June 5, 2007, Wizards released Star Wars: Roleplaying Game - Saga Edition Core Rulebook. The game was streamlined