Wherever you go take Atton the Pazzak playing scoundrel with you, the reason being is that he is very useful when your Force Points start getting low and you need to regenerate quickly. Play a game of Pazzak and your Force Points will be regenerated when you complete the game.

During game play enter Y, Left, A, Y

Unlock Different Characters
By making decisions you will have a choice of different characters.

Unlock Disciple:
Select a female character at the beginng and the Disciple will join you once you meet up with him on Dantooine.

Unlock Handmaiden:
Select a male character in the beginning and the Handmaiden will join you once you leave the Telos Jedi Academy.

Unlock Hanharr:
Align yourself with the Dark Side before the fight between Hanharr and Mira and Hanharr will join you.

Unlock HK-47:
Collect the 4 different HK parts that are scattered across the worlds and talk to the broken HK droid near the bridge and when he is fixed he will join you.

Unlock Mira:
Align yourself either in Neutral or with the light side before the fight between Hanharr and Mira and Mira will join you. Unlock Free Roam Camera:
Enter Y, Left, A, Y at the GUI panel and then press the Right analog stick. 'Punch it Chewie' will appear in the messages as confirmation if the code has been entered correctly.