Fallout 3 Cheats

CompleteAllObjectives / CompleteQuest: Complete quest objectives
player.ForceAV <amount>: Directly set your skill values
DisableAllMines: Disables mines
getXPfornextlevel: displays xp needed for next level
SetPCYoung: Everyone wants to be a kid again!
SexChange: Go ahead, be a transvestite, i won't ask any questions
tgm: God Mode
player.PlaceAtMe <objectID>: I'm working on finding and making an ObjectID list, but for now, just use the ones we know: 000000A(Pins) & 000000F(money)
CloseAllMenus: Just in case...
player.modav skill #: Modifies player's desired skill. (player.modav luck 10)
EnablePlayerControls: Move around during "locked" cinematics
movetoqt: Moves the player to the current quest marker
tcl: No clipping mode
showracemenu: open the character creation screen
player.modav actionpoints #: Permanently modifies players max action points
player.modav carryweight #: Permanently modifies players max weight
player.additem 0000000F "XXX": Replace "XXX" with the amount of caps(money) you want
rewardxp xxx: Replace xxx with the number of experience points to receive
ResetQuest: Resets a quest... assuming you would want to do such a thing?
resurrect: revives dead target
rewardKarma #: reward # karma points to player
setspecialpoints #: set the number of special points to #
player.setav<SKILL> #: Sets skill level to #. Max 100. this sets all skill bonuses but those from gear, tag skills, or attributes
player.setav<S.P.E.C.I.A.L.> #: Sets the typed attribute to the number provided. (1-10)
AddPerk: That's right! Get any perk you want, any and/or all
tfc: toggles free camera mode (useful for character screenshots)
tm: turns off/on the HUD (useful for character screenshots)
unlock: Unlocks any selected physical lock (doors, chests, etc) and terminals
RewardXP <amount>: Use this to reward yourself some xp
MoveToQuestTarget/movetoqt <optional: questID>: Warp to your quest' target location

Fallout 3: Point Lookout DLC Achievements
Complete each achievement to get the allotted gamerscore. If you have an Xbox 360 gamertag, you can log in using this same gamertag and the achievements will count the same as if you were playing the 360 version.

A Meeting of the Minds (20): Completed "A Meeting of the Minds"
Bog Walker (40): Discovered all locations within Point Lookout
The Local Flavor (20): Completed "The Local Flavor"
Walking With Spirits (20): Completed "Walking With Spirits"

Fallout 3: Mothership Zeta DLC Achievements
Complete each achievement to get the allotted gamerscore.

Alien Archivist (20): Collected all Alien Captive Recordings
Among the Stars (20): Completed "Among the Stars"
Not of This World (20): Completed "Not of This World"
This Galaxy Ain't Big Enough... (40): Completed "This Galaxy Ain't Big Enough..."

Infinite XP
You can gain infinite XP if your speech skill is high enough. (My speech was about 30 at the time). Go to town called "Big Town" located north of Vault 101.If you spoke with a girl named Bittercup she should tell you about her dating exploits. After speaking with her, go into the house marked "Common House" and speak to a man named Pappy. There should be a speech skill dialogue option that says "You came here with Bittercup, right?" You will get XP every time you click it. (I got 6XP with each click). Continue to do this and you can rack up XP in mere seconds. Bethesda has not yet patched this glitch.

The Replicated Man quest: Get both rewards
When you discover the identification of the android and are deciding to turn him in or warn him, go to the android first. Convince him to go to Zimmer on his own and he will reward you. After that, go to Zimmer in the science lab. Tell him about the android's identity. He will also reward you. Note: You will still get bad karma.

Finding Dogmeat
Dogmeat is found in Scrapyard. On the world map, Scrapyard is in the top right corner of the square that is two squares directly below Minefield. Follow the clear triangle on your compass if you are having problems finding it. Go into Scrapyard and look/listen for fighting. Your will find Dogmeat fighting a Raider. Once the Raider is dead you can talk to Dogmeat and ask him to join you.

Easy caps
Note: Only proceed if you want to take the "evil" path. After agreeing to help Mr. Burke nuke Megaton, go into every single house and steal everything (any little piece of junk you can carry). Sell them to the local shops (Craterside Supplies, The Restaurant, Moriarty's Saloon, etc.). If a particular house is locked or you need a key to get into a safe or something of that nature, simply kill the owner of said property and get the key from his or her body. Kill everyone in sight, especially the shop owners because you can get access to their entire inventory, plus the caps that you have already spent on them. Kill every one and collect everything to leave Megaton empty. You should have at least 600 caps. Remember to sell some of the things you gather to the shop owners because you cannot fast travel when over encumbered. This can be done in almost any town you visit. To avoid getting over encumbered, get all the supplies that you can possibly carry, then drop the rest just outside of Megaton. Fast travel to Rivet City or some other marketplace. Sell what you have, then return to Megaton and repeat the process.

Fabian Solis
Save all pre-war books you found (not scorched or ruined). Go to the Arlington library. At the southeastern corner you can find an NPC that will buy those books for 100 caps each. You will also get 10 experience points for each book you sold.

Easy Stealing, Hacking, and Speech bonuses
Save the game before starting a dialogue with a Speech bonus, hacking a computer, lock picking, or pick pocketing. Simply reload the game if you fail the challenge.

Lock picking
Use the following trick to avoid breaking bobby pins when trying to pick a lock. Just before the bobby pin is going to break, exit that screen then go back. You will save a lot of bobby pins by doing this. This also works when trying to get a password for computers.

Super Mutant Behemoth locations
There are five Super Mutant Behemoths that can be found and killed. After they die they cannot respawn. You can find them at the following locations.

Galaxy News Radio: This Behemoth will destroy a wall just outside the GNR Building as you enter the area (quest related).
Evergreen Mills: At the bandit camp near Vault 112, a Behemoth is behind an electric enclosure beside the train tracks. When the generator powering the enclosure is destroyed the Behemoth will escape.
The Capitol Building: Use the west entrance and go inside the main room. Look on the map. The room is straight down the hall from the entrance. However debris will force you to find an alternate route there.
Takoma Industrial: Located east of the GNR Building at the end of the map. The Behemoth is just north of the factory, standing in the middle of some wrecked cars.
Jury Station: Go west until you find a group of crumpled up train cars. Search this area until the Behemoth appears. You will know if you are in the correct area if you see a teddy bear in a shopping cart.

Achievements
Achievements are unlocked by accomplishing the listed task and will give you the listed number of gamer points. If you have an X-Box 360 gamertag, you can log in using this same gamertag and the gamerpoints/achievements will count the same as if you were playing the 360 version / any other X-Box 360 game.

Agatha's Song (20GP): Completed "Agatha's Song"
Ambassador of Peace (20GP): Reached Level 14 with Good Karma
Big Trouble in Big Town (20GP): Completed "Big Trouble in Big Town"
Blood Ties (20GP): Completed "Blood Ties"
Data Miner (20GP): Hacked 50 terminals
Doesn't Play Well with Others (20GP): Killed 300 people
Escape! (20GP): Completed "Escape!"
Finding the Garden of Eden (20GP): Completed "Finding the Garden of Eden"
Following in His Footsteps (20GP): Completed "Following in His Footsteps"
Galaxy News Radio (20GP): Completed "Galaxy News Radio"
Harbinger of War (20GP): Reached Level 14 with Bad Karma
Head of State (20GP): Completed "Head of State"
Keys are for Cowards (20GP): Picked 50 locks
Last, Best Hope of Humanity (30GP): Reached Level 20 with Good Karma
Mercenary (10GP): Reached Level 8 with Neutral Karma
Oasis (20GP): Completed "Oasis"
One-Man Scouting Party (20GP): Discovered 100 locations
Paradigm of Humanity (30GP): Reached Level 20 with Neutral Karma
Picking up the Trail (20GP): Completed "Picking up the Trail"
Pinnacle of Survival (20GP): Reached Level 14 with Neutral Karma
Protector (10GP): Reached Level 8 with Good Karma
Pychotic Prankster (10GP): Placed a grenade or mine while pickpocketing
Reaver (10GP): Reached Level 8 with Bad Karma
Reilly's Rangers (20GP): Completed "Reilly's Rangers"
Rescue from Paradise (20GP): Completed "Rescue from Paradise"
Scientific Pursuits (20GP): Completed "Scientific Pursuits"
Scourge of Humanity (30GP): Reached Level 20 with Bad Karma
Silver-Tongued Devil (20GP): Won 50 Speech Challenges
Slayer of Beasts (20GP): Killed 300 creatures
Stealing Independence (20GP): Completed "Stealing Independence"
Strictly Business (20GP): Completed "Strictly Business"
Take it Back! (40GB): Completed "Take it Back!"
Tenpenny Tower (20GP): Completed "Tenpenny Tower"
The American Dream (20GP): Completed "The American Dream"
The Bigger They Are... (20GP): Kill all the Super Mutant Behemoths
The G.O.A.T. Whisperer (10GP): Took the G.O.A.T.
The Nuka-Cola Challenge (20GP): Completed "The Nuka-Cola Challenge"
The Power of the Atom (20GP): Completed "The Power of the Atom"
The Replicated Man (20GP): Completed "The Replicated Man"
The Superhuman Gambit (20GP): Completed "The Superhuman Gambit"
The Wasteland Survival Guide (20GP): Completed "The Wasteland Survival Guide"
The Waters of Life (20GP): Completed "The Waters of Life"
Those! (20GP): Completed "Those!"
Tranquility Lane (20GP): Completed "Tranquility Lane"
Trouble on the Homefront (20GP): Completed "Trouble on the Homefront"
Vault 101 Citizenship Award (10GP): Got the Pip-Boy 3000
Vault-Tec C.E.O. (30GP): Collected 20 Vault-Tec Bobbleheads
Weaponsmith (30GP): Made one of every custom weapon
Yes, I Play with Dolls (10GP): Collected 10 Vault-Tec Bobbleheads
You Gotta Shoot 'Em in the Head (20GP): Completed "You Gotta Shoot 'Em in the Head"

Fallout 3: Operation Anchorage: Get All Weapons
To get all of the 5 gear kits, simply drop the weapons of your existing kit on the ground before talking to the quartermaster. Usually he will take back the items from your previous kit and give you your new one, however since they are on the ground he can't. You will receive your new weapons and get to keep your old ones.