New Vegas: House as a bunch of securitrons but they still work with their secondary armament.
I havent played 3 yet so i cant really comment on its factions. What are we working with, is each faction at their respective strongest in the game or is each faction at the point where they are at the point where you first meet them in the game (so basically the beginning, except some instances) or are we working with them having established themselves but you haven't angered the other factions to a point of no return? First: Let's assume its the beginning of their respective games, as it would just be too confusing to have multiple factions have control or access to the same facilities.