Such a great game, the best part is you can customize a lot of what happens in the game and how the story goes. [spoiler]I have successfully done an NCR/BoS/Great Khan/Boomers Alliance against the Legion, it was amazing. Not all my NCR guys died at the beginning this time, this time they had support from the Khans, I know it shouldn't exist that way but it worked. Boomers brought our fully repaired B-29 WW2 bomber to help bomb enemies in strafing runs, it was glorious. In the second half of the Dam the Brotherhood dropped in a Vertibird and a whole squad of Knights dropped down in power armor to aid the final push with my three Veteran Rangers. Such a cool ending. There are so many factions and combos of factions it is hard to replicate a same gameplay from a previous run, your factions really bring a lot to the fight and they make the fight something interesting to behold. Did I say I also am a fan of New Vegas, cause I am a fan of New Vegas, its like 3 but somehow better even though its almost the same. [/spoiler]

The replayability is amazing