ZEALOT

In Onderon while I tried to prove the doctor wasn't guilty, I collected the droid's head, talked to Kiph, and he told me to talk with Nikko. Nikko said he will go to Riiken, and then the game halts, returned to "main menu", which, all buttons are disabled. Then I press Alt-F4, and the game prompts me extraordinarily to "save". I choose no, and the game exits. Any way to solve the problem?