Chris Avellone is an American video game designer and comic book writer. He worked for Interplay and Obsidian Entertainment before becoming a freelance designer and writer. He is best known for his work on role-playing video games such as Planescape: Torment, Star Wars Knights of the Old Republic II: The Sith Lords and the Fallout series.

Obsidian Entertainment, Inc. is an American video game developer based in Irvine, California. It was founded in June 2003, shortly before the closure of Black Isle Studios, by ex-Black Isle employees Feargus Urquhart, Chris Avellone, Chris Parker, Darren Monahan, and Chris Jones.