I got on You Tube and there were 2 solutions. One guy said to jump across from the outside dining area to the adjoing roof and then jump on the roof and jump off the building. Well, I jumped across to the roof but never could get on top of the roof. Then some guy said to take Theo's body and put it on the bed under where the ceiling is caved in, place a traffic cone on top of the body and jump up to the ceiling. That was creative, but I went back to a previous save in the Metro tunnels and replayed the game. I also remembered to keep my radio on this time. That way I found out that Reilly's Rangers needed help. Since I didn't get their distress signal before, which changed the whole gameplay and made Reilly's Rangers my enemies. For some reason the surviving ranger fired on me, and I took her out. The game is highly interesting, but if you don't do something you are supposed to do, it changes the whole gameplay. In order to get off the roof, you must have the Ranger mechanic fix the elevator for you with a fission battery you get from destroying a robot. Otherwise, you are screwed, and the game has stopped for you. I discovered that I wasn't the only one who had done this particular goof up because most people don't want to listen to that endless crap on the radio, either from the Enclave or Three Dog. I learned from my mistakes, though. I leave the radio on now.
I have done Three Dog's mission to the Washington Monument and I did the National Archives side mission with the girl, Sydney, who I might add was hard to keep alive, but I managed it. Now she's an arms dealer in the Underworld.
I know where the kid's dad went to, but I am avoiding that mission and wandering around all over the place. I love this game. There are enough adventures here to last all year, I think, and I have been playing for over a week now.
I will never have time to load up the addons. I will probably be tired of the game by the time I finish it. That's what happened to me when I played the game, Painkiller.
I have read where a lot of posters here are having trouble with bugs in New Vegas. Well, I have experienced quite a few crashes in Fallout 3, but most just crash me to the desktop, with only 1 that made me do a hard boot. I would search for a patch, but I'm afraid that patching it will corrupt my saved games, and I really don't want to have to start this game all over.