Karma (Fallout 3)

Karma is the reflection of all good and evil choices made during the game and how they are perceived by the inhabitants of the wasteland.

Karma levels
The Lone Wanderer begins the game with a value of zero, which increases or decreases based on the their actions. There are 5 levels of Karma:


 * Very Good: +750 to +1000.
 * Good: +250 to +749.
 * Neutral: -249 to +249.
 * Evil: -250 to -749.
 * Very Evil: -750 to -1000.

Karma titles
The Karma status is defined by a "Karma title," depending on one's Karma points and level. Karma titles above level 20 can only be reached with add-ons.

Positive

 * Donating caps to a church (In increments of 10, 50, or 100): +1 Karma per cap.
 * Selling fingers taken from the corpses of evil characters (you killed) to Sonora Cruz via the Lawbringer perk: +10 Karma per finger.
 * Giving scrap metal to Walter in Megaton's water processing plant for free: +10 Karma per scrap.
 * Giving away purified water, or Aqua Pura with Broken Steel installed, to beggar characters like Carlos outside of Rivet City: +50 Karma per item.
 * Performing a good action in a quest: At least +50 Karma (ex: Bring Cherry to Rivet City.)
 * Giving 25 caps to Mei Wong to buy a gun: +100 Karma
 * Saving a wasteland captive: +50 Karma 
 * Saving a wasteland captive without the Reward: +75 Karma 
 * Killing a Very Evil character or creature (Allistair Tenpenny, Mister Burke, Eulogy Jones, Carolina Red, Ahzrukhal, Jaime, Jotun, Ymir, Cutter or a cannibal Hunter): +100 Karma
 * Disarming the Megaton bomb in The Power of the Atom quest without requesting payment: +200 Karma
 * Activating the Failsafe in the Tranquility Lane Simulation: +300 Karma
 * Activating Project Purity by yourself in the quest Take it Back!: +600 Karma
 * Blowing up the Enclave Mobile Command crawler in Who Dares Wins in the Broken Steel add-on +500 Karma
 * Taking the Escalator to Heaven perk in the Broken Steel add-on: +2000 Karma (essentially, it resets Karma to the maximum 1000).
 * Destroying the Krivbeknih in the Point Lookout add-on: +500 Karma
 * Siding with the abolitionists during Head of State.
 * Making a truce between The Family and Arefu.

Negative

 * Devour a corpse (Cannibal perk required): -1 Karma per corpse.
 * Stealing from a non-evil character or faction: -5 Karma per instance (note that when stealing from owned (red text) containers, such as cabinets or lockers, the Karma change applies once per activation of that container. Meaning, if a container is opened once and two items are stolen, 5 Karma will be lost, but if the same container is opened twice, stealing one item each time, 5 Karma will be lost each time, which means 10 Karma lost in total). Items can be replaced in owned containers after being stolen, and then stolen again and again with the same Karma loss each time, making for a useful method by which console gamers can decrease their Karma, although repeatedly hacking an owned terminal is a faster way of doing this.
 * Repeatedly hacking an owned (red text) terminal (Classified as stealing, but can be done over and over again) -5 Karma per hack attempt, NOTE, even accessing the terminal will result in negative Karma.
 * Selling ears taken from the corpses of good characters (one has killed) to Daniel Littlehorn via the Contract Killer perk: -10 Karma per ear.
 * Killing a good creature: -25 Karma
 * Giving away Aqua Pura with the modified FEV with Broken Steel installed, to beggar characters like Carlos outside of Rivet City: -50 Karma per item.
 * Performing an evil act in a quest: At least -50 Karma
 * Killing a non-evil character: -100 Karma (although, this can be gotten around by shooting them once, making them hostile, then letting a follower kill them.)(note)
 * Giving Psycho to Paulie Cantelli in Rivet City: -100 Karma each time so long as he is alive.
 * Enslaving any character with the Mesmetron: -100 Karma
 * Burning Harold in the quest Oasis: -200 Karma
 * Bringing Bryan Wilks to Paradise Falls during Those!: -400 Karma
 * Causing Mister Lopez to commit suicide (either by pushing him or insulting him): -500 Karma
 * Letting the Feral Ghouls into Tenpenny Tower in the Tenpenny Tower quest: -600 Karma
 * Blowing up Megaton in The Power of the Atom quest: -1000 Karma
 * Infecting Project Purity with the modified FEV in the Quest Take it Back!: -1000 Karma
 * Blowing up the Citadel in Who Dares Wins in the Broken Steel add-on: -1000 Karma
 * Taking the Devil's Highway perk in the Broken Steel add-on: -2000 Karma (essentially, it resets Karma to the minimum -1000).
 * Lying to Weston Lesko that the Nest Guardians are dead during Those!.
 * Siding with the slavers during Head of State.
 * Killing Timebomb in Big Town.

Other

 * Taking the Karmic Rebalance perk in the Broken Steel add-on: Karma reset to 0.

Good Karma

 * Access to Star Paladin Cross and Fawkes.
 * Talon Company mercs will spawn and hunt the player character.
 * A citizen in Megaton will reward the player character with ammo and other gifts.

Neutral Karma

 * Access to Sergeant RL-3 and Butch.
 * Neither Talon Company nor the Regulators will hunt the player character.
 * The use of the Impartial Mediation perk.

Evil Karma

 * Access to Clover and Jericho.
 * The Regulators will spawn and hunt the player character.
 * A slaver in Paradise Falls will reward the player character with ammo and other gifts.

Companions and Karma
Most companions have a Karma level requirement that must be met if the player character wishes to enlist them:
 * Clover and Jericho require the player to have bad karma to be recruited. They will not leave if one's Karma becomes neutral or higher, but Jericho won't rejoin the player if their karma is not evil or very evil, while Clover will rejoin regardless of the Lone Wanderer's karma level.
 * Butch DeLoria and Sergeant RL-3 require the player to have neutral Karma. They will not leave if one's Karma becomes good or evil, but won't rejoin the player if their karma is not neutral.
 * Fawkes and Star Paladin Cross require the player to have good Karma. They will not leave if one's Karma becomes neutral or lower, but won't rejoin the player if their karma is not good or very good.
 * Dogmeat and Charon will follow the player character regardless of what their Karma level is.