The Star Wars: Knights of the Old Republic series consists of Star Wars: Knights of the Old Republic, The Sith Lords and a massively multiplayer online role-playing game called The Old Republic, with the first game being released in 2003 and set 4,000 years before the Star Wars films. The series also encompasses a 2006 comic book series.
The main and player character of the first game is Revan, and the main and player character of the second game is the Jedi Exile. In both games, the main character can either be a human male or a human female, with other characters joining the player's party and becoming controllable. The player can control three characters at one time in both games. HK-47, Canderous Ordo and T3-M4 appear in both of the video games as playable character, while the first game's playable characters also includes Carth Onasi, Mission Vao, Zaalbar, Bastila Shan, Juhani and Jolee Bindo. The second game's playable characters also include Atton Rand, Bao-Dur, Mical, Mira, Hanharr, Brianna, Kreia, Visas Marr and G0-T0.
The characters have overall been well-received, with the first Knights of the Old Republic winning the Academy of Interactive Art's "Outstanding Achievement in Character and Story Development", and both Kreia and HK-47 receiving other awards.
Chris Avellone, the lead designer of The Sith Lords, has said that "a core part of what made KOTOR I so great was the story and your companions, and that was our intention in the sequel as well", and has also said that he thought that the characters and voice-acting were some of the key strengths of The Sith Lords, and said that they got a lot of help and support from LucasArts in the voice-acting and sound department. Avellone stated that in some cases, the characters turned out "better than we thought they would be". According to Avellone, while "there was some stuff we wanted to add", overall they "got almost everything we wanted in there". Avellone has said he has been surprised by the positive feedback of some of the characters.