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I will definitely replay it, because the first time I foolishly rushed to Korriban, and the enemies there are quite tough (although I still managed to defeat them).
1. I prefer not to engage in racing or fighting – by the end, I had so much money that I didn't know what to do with it, and besides, I didn't really try to maximize my earnings.
2. No, I just convinced a couple of friends to turn off the sound effects, and then the cute little creature simply drove everyone away.
I had to work hard against Malak; he's a tough opponent. But lightning helped me – I ran around, then I took out all the Jedi and ran away from him, hitting him occasionally.