Well you go to Primm. What you do is you leave Goodsprings and you take a right and an NCR soldier will tell you not to go in. Go on and cross the bridge (watch out for mines) and there's about 4 or 5 convicts on the other side. After, go into the Vikki & Vance Casino and talk to Johnson Nash.
Nothing in New Vegas spoils Fallout 3. They take place in 2 completely different corners of the country. And New Vegas can not spoil anything for Fallout 3, as New Vegas takes place before the events of Fallout 3. Hope this helps! Also Fallout 3 is not a sequal. But lets pray for a Fallout 4
There is no official cover system on Fallout 3, but sure you can take cover.
The title Fallout 4 hasn't been announced so it could be anywhere in the United States. But if your referring Fallout 4 to New Vegas (comon mistake) it as the title explains in Las Vegas.
No no more DLC is being developed for Fallout New Vegas. There are; however, multiple Area 51 mods you could take a look at.
No. Once you help either Yes Man, the NCR, or Caesar's Legion take over New Vegas, whoever you helped is who you're sided with.
definitely the ncr path its boss
MF Cells, 5 cells per shot
I could imagine that it takes place in America just like every single other game in the Fallout series.
6 to 8 GB
You go east from goodsprings. You end up following all the quests and makeing a giant loop but its safe. Only go north of goodsprings if you are a high level and have good armor and weapons and companions, try best to get sneak attack kills and use vats when ever possible and have a but load of med x and stims. From Goodsprings, the game's starting point, the player only needs to head north-east and enter the area called "Freeside" and just continue on to the strip area, which is only a bit further on in the city area. This is not advised, however, as many of the creatures and NPCs are very high leveled, and the quests before going to New Vegas are used for the main purpose of leveling the character, and looting stronger items for the quests in New Vegas.
It's considered stealing.
Hide from them take off the suit and as long as you are friendly rep it should work