You can find Dogmeat at a place called the Scrapyard, its close to the town with all the mines, (Minefield I think is the actual name). He will be killing some raiders and you just have to talk to him and not shoot him when he is done. Like all followers, he can die.
After completing a significant portion of the main story line and if you have good karma you can recruit Fawkes (if you save him earlier).
You can buy Charon's contract from the Underworld's Ninth Circle bar.
There is a traveling robot salesman (requires neutral karma) that will sell you a combat robot.
If you have good karma and the Broken Steel DLC there's Paladin Cross who can join you.
If you are evil Jericho from Megaton will join you.
If you are evil you can get Clover from Paradise falls, a slaver camp.
There are no Mounts in the unmodified version of Fallout 3.
There is no more a master key in Fallout 3.
You can find President Eden in Fallout 3 at Raven Rock, but he is also a computer!
go to games for windows find the fallout 3 dlc buy it and you will have it
you can not find any energy cells in Fallout 3 after you find the ones with the alien blaster, you are limited to that number
No, you can only craft, find or buy the dart gun in Fallout 3.
You would need to have the PC version of Fallout 3 and download a mod.
fallout3nexus.com
find who
You have to find the schematics to make it.
little lamplight
On the side of the case ( the spine )