|For the act, see Cannibalism.|
With the Cannibal perk, when you're in Sneak mode, you gain the option to eat a corpse to regain Health. But every time you feed, you lose Karma, and if the act is witnessed, it is considered a crime against nature.”— In-game description, Fallout 3
With the Cannibal perk, you are able to feast on dead humans and non-feral ghouls by being in sneak mode and activating the "Devour" option. The feast will restore 25 hit points, but add 2 rads and cause you to lose one point of Karma. If anyone sees you devour a human, it is considered a crime against nature, turning all friendly non-player character's in the area hostile.
Fallout: New Vegas
The perk functions the same as it did in Fallout 3, except that it can be acquired much earlier (at level 4 instead of level 12). Should Hardcore mode be enabled, corpses will also reduce the starvation meter by 25. After consuming 25 corpses, the player will acquire the Dine and Dash challenge perk, allowing them to harvest human remains, rather than eat the corpse directly.
Cannibal also provides additional dialogue options; in the Beyond the Beef quest, when talking to Marjorie, there's a dialogue option that says, "<Lie> It's okay, you can be honest with me. I eat people too, you know". With this perk, the 'lie' part is erased. Mortimer also has some dialogue options. In addition, in Dead Money, you can ask Dog how the ghost people taste.
- In Old World Blues the player can also eat the corpses trapped inside Y-17 trauma override harnesses.
- There is a hidden challenge perk tied to Cannibalism that is undocumented even in the official strategy guide. This perk is called "Meat of Champions" and in order to gain it, you must feed on Mr. House, President Kimball, The King, and Caesar.
The Cannibal perk grants the ability to feast on humanoid corpses to restore lost health.”— Fallout 4 loading screen hints
With the first rank of this perk, feasting on human corpses restores a small amount of health. The second rank allows one to eat ghouls and super mutants to regain lost health as well. The third rank significantly increases the amount of health restored whenever eating human, ghoul or super mutant corpses. Cannibalizing corpses in Survival difficulty will lead to the dark craving effect.