I have completed the game in every way on XBox 360 so now that I am playing on PC (no achievements) I am in no hurry to finish the story or take sides. Problem is, I got a bit overzealous when completing NCR missions and now have the legion after me. Fortunately I have a save game with every prior main-story quest and just about every side mission completed, and in this save game I am yet to enter The Tops or accept Mr House's invitation, and it's only a couple of hours older than where I stopped.
Prior to turning the legion against me, I had made pretty good progress for all factions (except Powder Gangers, Fiends and Vipers). I think I had managed to secretly inform the Khans of the legion's real intentions (Independent of the NCR quest), I stealthily completed a few quests against the Legion for the NCR, as well as completing a couple of missions for Caesar. I also managed to side the Boomers with The NCR and get the Kings and NCR to call a truce without having the legion turn on me. My theory was that the point where I pushed it too far with the Legion was when I informed Colonel Moore that I had already convinced the Khans to break ties with the Legion OR PERHAPS the mission after where I tell her that I had already dealt with the Olmertas, although I cannot be sure.
I wonder if anybody else has sought to achieve a point in the game where they've completed the maxumim numer of quests possible while keeping all major factions happy with you. If so, I would appreciate any ideas how you went about it so I can use my old save game to reach this point.
Cheers!