Simplify the following text for a Grade 5 native English-speaking person.
Original: LucasArts developed Star Wars Jedi Knight : Mysteries of the Sith as an expansion pack for Dark Forces II , this time giving the player control of Mara Jade as well as Katarn . In 2002 , Star Wars Jedi Knight II : Jedi Outcast was added to the series .
Simplified: The Jedi Knight series is a series of games made by Lucasarts .