Fallout: New Vegas

If you find the need to get this achievement immediately, Here's how you go about doing it. It will take about a half an hour, which is still relatively quick, plus if you follow the commentary, it'll tell you how to achieve 28 perks. (But that's off topic.)

In the beginning of the game, make sure you have at least a speech of 25. Get to the point where you meet the powder ganger, Joe Cobb, who wants you to kill a guy called Ringo. Tell him you'll do it. Go to the house where he is located (It will be shown on your compass if the quest is selected), and kill him, ONLY after getting the caravan set from him. (You can only do this through conversation) Once done, tell the powder gangers you'll help them take over town and go looking for supplies. Once you tell him this, kill the powder gangers. Now go into the supply shop and tell Chet, the owner, over and over that he should donate to the powder gangers. You will be able to use this speech process over and over. he will continue giving you leather armor and 9mm ammunition, (which i find very useful at least to sell to someone like the gun runners for 8000 caps later on.) as well as a lot of experience over and over. It'll take about 30 minutes if you keep at it to get to level 30.

Make sure your first two perks are swift learner. It will make the process must faster.

Also, if you don't care about the 28 perks and cheating, it won't matter what you pick, because once you leave town, you have the choice to completely rebuild your character, so those swift learner perks you chose at first, can be replaced with something useful.

If you don't want to glitch, this can be done pretty easily through normal means.

Early on, take the perk (as many times as you can) that gives you +10% experience. From there, do all the other achievements you can that don't conflict with each other, and that should put you VERY close to level 30. Finishing one of the storyline quests should then put you over the edge. I'm currently at ~28.5 after finishing all but 2 of the non-storyline quests.

You need a few things for this to work.
1. speech 40 or above
2. accepcted by the NCR

Go to camp golf (near lake las vegas) and speak Sergeant McCredie in his communications tent, and start the "Flags of our foul ups" side mission by offering to help whip his team into shape. After mission has started* EDIT* talk to Ohanrahan(tall guy, red hair),ask about squadmates and agree niceness is the best way to help, then go speak with Razz, short guy says "holmes" and has a mohawk. Ask him about his team and then you get a speech challenge,40+, win the challenge and keep doing speech challenge over and over. you get xp every time you win. keep tapping A so you are constantly challengening and getting XP. If you stop getting xp, tell razz goodbye, apply stat points and perks for all the levels you went up. Go to Razz and start the speeech challenge again. Keep goin til you hit lvl 30.

If an update patches this, you will have to go to your memory in system settings from your xbox dashboard and clear cache and do this method off line. once you hit lvl 30 you can play online and download updates. I started this at lvl 9 so as long as your speech is high enough and NCR does not hate you, you can get this pretty early in the game.

MSG me if I left anything out and I will edit solution.


*note: this will also get you Orater achievement. ( 50 speech challenges)

If you don't mind using a glitch to get it here's one I came across.

First clear your cache and play offline because It has been patched.

Go to HELIOS 1 (you will need a 30 speech to get in, or an NCR uniform), start That Lucky Old Sun quest by talking to Ignacio down there. When you're diverting power, choose the 5th option.

Finish the quest by talking to Ignacio tell him you done, You get 450 ish xp, 3 stimpacks and 2 doctors bags and you'll be able to repeatedly tell him your done until you get to level 30.

If you are short on a few levels and nearing the end of the story instead of glitching do the honorable thing and go to The Thorn and just continuously fight the toughest creature you can handle and about 150xp should be rolling in ever 1-2 minutes depending on how quick you are.

The Thorn is also a EXCELLENT place to start working on weapon achievements or letting the animals kick the shit out of you to work on stimpaks and food achievements (drowning yourself is a tad bit easier tho).

Really easy to get. A few days ago i found a weird glitch in the quest where you need to kill Big Sal at Gomorra's Casino. First off i shot off his leg. And after that while i completed the quest. I just started punching the amputated leg out of boredom. I received 400+ exp with each punch. It only took me 10 minutes to reach level 30. I don't know if it just happens in my game. But you can at least give it a shot.

Quest: How Little We Know

(My game is updated with the latest patch)

Currently I'm using this method.
In Bitter Springs, the area with a lot of tents and "refugees".
There's a 2 "tin" wall section (there's a remains of a third wall)
Inside is a straw matress with a sleeping female refugee, and an empty normal matress. on the local map the room is surrounded by two "huts" and one other similar shaped metal fenced area.

This sleeping refugee can be "mister sandman murdered" unlimited times, save regular because I sometimes get thrown into the wasteland near centaur and I'm unable to get back. It took me 8 minutes to get from level 24 to level 25.

edit: I just noticed, there's a salesman weekly on her matress, to help identify the refugee.

She never seems to wake up without being hit or talked to.
The salesman weekly is by her knee.
She has empty inventory when pickpocketed.
There is NO bad karma, or good karma gained or lost in this method.
You do not need to be [HIDDEN], this will not cause hostile enemies.