Here is Fallout New Vegas developer diary number four. This time they speak on how you will be able to interact with the different factions within the game. These factions will be a big part of the game this time around. The New Californian Republic, Caesars Legion and Mr. House seem to be the three main factions who are all bickering over control of the Hoover Dam; which still has the ability to generate power. There are also a few smaller factions that you can shift alliances with. Watching this developer diary only makes me crave the game even more, because for some reason I have the urge to kill Mr. House.