If you chose the light side in Dark Forces 2: Jedi Knight, the true ending, then you fight and kill Sariss. If you choose the dark side, she chickens out and becomes Kyle's servant. I thought that the dark side ending sucked, but hey, what are you going to do?
Revan: Sometimes I feel like you don't know me at all. (Lightsaber ignites) (Slices) And now, you never will. HAHAHAHAHA!
"Austin..... I am your father."
"No, not really. I can't back that up."