I've killed him twice now and each time my xbox freezes after killing him, and I haven't been able to get the mission completed because of it. This is such a stupid reason to not be able to finish a mission -.-
Anyone else having this issue?

Try saving the disc to your console?

Did that the day it came out lol. Have you beaten him without it freezing? or are you just giving general advice?

i happened to me a few time fighting terramorphus loads but i saved disc to xbox and it works fine everytime.
have kiled master gee andn its been fine :-/

Friend and I killed him again. The third time it worked. So for me the chances of not freezing are 1/3 -.- that's stupid