Fallout 3

The Karma achievements are made significantly easier with the addition of the Broken Steel perks.

The first step in getting all three achievements is to create three save files at level 28. The closer you are to reaching 29, the better, but at any point will work fine.

Getting to level 30, not the karma, is actually the hardest part of these achievements. If you are like me, and reached level 20 long before the game ended and before you got Broken Steel, you have a long way to go after the added quest ends. The first things I would do is the side-quests that are offered surrounding Project Purity. Return to the Jefferson Memorial and offer to help Scribe Bigsley, who is inside the building. That will result in two decent quests. There is also a side-quest that can be accessed by hacking or a successful speech on Bigsley or by talking to the ghoul Griffon in the Museum of History.

Once those quests have been competed, you will probably still have a long way to go. The fastest way to make up that experience is by hunting Super Mutants. After finishing the Broken Steel quest-line, speak to Paladin Tristran and ask if there is anything else you can do to help. He will offer you a reward for killing super mutants and bringing back blood samples to him. This is much easier than scouring ruined buildings for scrap metal, pre-war books, cameras or sensor modules. The National Mall and the Germantown Police station are great places to hunt mutants. Just make sure to get the well-rested bonus before you trade in the samples. 10% extra experience goes a long way in this grind.

You can also increase the difficulty to get more experience per encounter. This is really a must if you are playing on easy or normal. The extra 15 or so EXP an encounter will really speed things up in the long run. Also remember to leave your companions at home. They are experience hogs. You won't receive any EXP from enemies that they kill.

Once you get there, load up one of those files and, when you reach level 29, choose Here and Now. This perk will immediately level you up again, to 30. At level 30 choose Devil's Highway. This will set your karma to Very Bad and you will get the achievement.

Rinse and repeat for the other karma achievements. I recommend that you don't use this method for whatever karma type you mainly play as, as it really is a waste of 2 perks.

Cheers!

Just before you hit level 30, save the game. When you pick your level 30 perk, choose one that alters your Karma.

There is an even eaiser way to get all three karma achievements in one go, as I have done and provided you have not yet chosen the "Here and Now" perk up until level 28. It involves reloading your gamesave, and is the way I did it before I completed "Who Dares Wins," the last mission in the Broken Steel DLC.

Alright, what I did was right before I hit 29, was I saved my game. I was originally always good so, I leveled upto 29, and chose "Here and Now" as my perk. That gave me the ability to reach level 30 and reqach the "Messiah" achievement.

Reload your gamesave, which was the one you have before hitting 29.

This time before hitting 29, go to any terminal that isn't yours (like the Craterside Supply one or the Brass Lantern one) and click on it and back out. It lowers your Karma. Keep checking yor Pipboy until you get Neutral Karma. Level up and choose the "Here and Now" perk. True Mortal Achievement Unlocked.

Reload your gamesave again. the same one we used beore you hit 29.

Now, the last one is easy. to get the "Devil" Achievement just slaughter Megaton as a 28, level up to 29, choose "Here and Now" as a perk, and tada Achievement Unlocked-Devil.

In the end, after I had all three achievements, I reloaded AGAIN, and finished the last mission. There was ALOT of Enclave/Stuff to kill so don't worry about not reaching level 30 by the end of "Who Dares Wins."

** MINOR SPOILERS BELOW. **

To get this achievement, you need to reach level 30 with bad karma. (Either have bad karma when reaching level 30, or reach level 30 and select the Devil's Highway perk.)

Getting to level 30

Straightforward enough, but there are ways to achieve this more quickly. First, avoid companions.

Second, look out for the NPCs who request certain types of items, and then watch to see if redeeming those items provides XP. Two such "standing orders":

* Scrap metal in Megaton. (Easy to find everywhere.)
* Pre-war books at the Arlington Library. (Excellent per-book XP.)

Lastly, I recommend hacking every terminal, picking every lock, and attempting (almost) every speech challenge. All provide nearly guaranteed XP, without the hassle of shooting an Albino Radscorpion or Super Mutant Overlord a half-million times.

Karma

Bad karma is easily obtained throughout the game, usually through the theft of items or the murder of wastelanders, but can also be gained by simply being mean during conversations. (I particularly enjoyed making children cry whenever possible.)

If you have a good/neutral karma and need to decrease your karma, this is easy -- go on a killing spree in Megaton or Rivet City. (Megaton is great for using the Fat Man.) This will have some obvious gameplay effects (reduced numbers of merchants to access), however, so I suggest saving the game prior to this -- go get the achievement, load your save, and then continue.

Neutral karma can be a tough target to hit sometimes, so my suggestion is to check your karma after each murder / mini-nuke. Once you hit neutral karma, simply stop killing and run away until you are out of range of all angry wastelanders.

If you actually need even more karma loss than that (I did for level 30), first steal everything you see, but be careful not to be caught, as it will typically provoke a gunfight. Then go on your murder spree.

One last note: Taking the evil path during the Power of the Atom quest will provide a lot of bad karma, so feel free to save that quest for "the right time".

As other already have said, the hard part is to reach level 30. I found a way which no one have commented until now, so there it go...
If you have the Mothership Zeta DLC, there is a part almost in the end (after the space walk) that you reach the weapons lab. Well, there is an area on the far left that have a button to summon enemies (raiders, robots and deathclaws). They are infinite and can't reach you for melee attacks (you stay on a higher platform without direct access). Just change the difficulty to very hard, press the 'summoner button' (multiple times if you want a lot of enemies at the same time rushing your leveling up), kill the enemies and repeat the process how much times you want. In the same area where you stay for the waves there is an archway heal, so even on very hard is almost impossible to die, just watch yourself and pass by it from time to time. I reach my levels 28, 29 and 30 that way and took me only about 40 minutes. Sweet!

By the way, after 1 our 2 waves, if you are using an alien weapon (like Alien Atomizer or Alien Disintegrator) you will gain the Xenotech Expert perk, that will give to you 20% more damage using these weapons (which are very good in my opinion, specially the Disintegrator).

For the achievements, everyone was already told about it:

- Just save right before reach level 30;
- Then when reach it just pick the Devil's Highway Perk to instantly turn you on evil status and get this:



- Load the savegame right before level 30;
- Now pick the Escalator to Heaven perk to instantly turn you on very good status and get one more cheevo:



- Load the same savegame again;
- Pick the Karmic Rebalance perk which turns you on neutral status and you finally will get the last level 30 achievement:

All of the guides you will see are really good ways to level up quickly etc.

For those of us who aren't looking for advice on how to level up and just looking for a quick way to make all three of the LVL 30 Achievements pop, do the following:

- Make a save right before you are about to hit LVL 30.
- Once you hit is and are able to distribute skill points and perks choose the Neutral Karma perk (Devil's Highway)
- After you choose this it will make you Neutral Karma and POP.
- Reload your save and do the same with the other 2 Karmas you need.

This is super easy to cover all three without taking time to mess about at this stage of the game.

Happy Hunting