Once I entered new Vegas I had the Caesers Legion and NCR excuse me for all the things I did to them (even though I was liked by the NCR) and they gave me a choice to side with either of them... Before that, I killed Mr. House and Yes Man so now I can only side with the NCR and Caesers Legion and it won't give me that opition anymore. I can't side with the Legion anyways because I killed loads of them but there is no option for the NCR anymore. Is this a glitch in which I have to live with and I can't beat the game or is there someone I can talk to in the NCR to help them and finish the game?