Brain

* Characters:
** Brain (mole rat), an intelligent albino mole rat with an enlarged braincase in Fallout 2.
** Calvert (brain), a brain in a jar and former mad scientist in Point Lookout in the Fallout 3 add-on Point Lookout.
** Courier's brain, the disembodied and interactive brain of the Courier in the Fallout: New Vegas add-on Old World Blues.
** Humanoid brain bot, a unique type of brain bot in Fallout Tactics.
** Brains of the Calculator found in Vault 0 in Fallout Tactics.
*** Artist brain
*** Doctor brain
*** Evangelist brain
*** Game designer brain
*** Lawyer brain
*** Politician brain
*** Porn actor brain
*** Scientist brain
* Items:
** Abnormal brain, a quest item in Fallout 2.
** Chimpanzee brain, a quest item in Fallout 2. 
** Cybernetic brain, a miscellaneous item in Fallout 2
** Human brain, a quest item in Fallout 2.
** Lump of brain, a quest item in the Fallout 3 add-on Point Lookout.
** Lupa's brain, a quest item used as a replacement brain for Rex in Fallout: New Vegas.
** Rey's brain, a quest item used as a replacement brain for Rex in Fallout: New Vegas.
** Violetta's brain, a quest item used as a replacement brain for Rex in Fallout: New Vegas.
** Brain fungus (Fallout 4), a consumable item in Fallout 4.
** Cybernetic brain augmenter, a quest item in Fallout 4.
** Brain (Automatron), a consumable item cut from the Fallout 4 add-on Automatron.
** Brain bombs, a consumable item in Fallout 76.
*** Recipe: Brain bombs, a recipe in Fallout 76.
** Brain fungus (Fallout 76), a consumable item in Fallout 76.
** Brain fungus soup, a consumable item in Fallout 76.
** Broiled scorchbeast brain, a consumable item in Fallout 76.
** Product brainstorming 1, a holotape in Fallout 76.
** Product brainstorming 2, an inaccessible holotape in Fallout 76.
** Scorchbeast brain, a consumable item in Fallout 76.
** Greg's brain, a quest item in the Fallout 76 update Wastelanders.
*** Prepped Greg brain, a quest item in the Fallout 76 update Wastelanders.
** Gina's brain, a quest item in the Fallout 76 update Wastelanders.
*** Prepped Gina brain, a quest item in the Fallout 76 update Wastelanders.
** Doctor Dias's brain, a quest item in the Fallout 76 update Wastelanders.
*** Prepped Doctor Dias brain, a quest item in the Fallout 76 update Wastelanders.
* Quests:
** A Brain's Best Friend, a side quest in the Fallout: New Vegas add-on Old World Blues.
** Picking Your Brains, a side quest in the Fallout: New Vegas add-on Old World Blues. 
** Brain Dead, a murder-mystery side quest in the Fallout 4 add-on Far Harbor.
** No Brainer, an ally quest for Sofia Daguerre in the Fallout 76 update Wastelanders.
* Other:
** Brainpower, a pre-War company that produced Vault-Tec compliant computer control systems, mentioned in Fallout 3.
** Project Brainstorm, a project outlined in the Pentagon library terminal, mentioned in Fallout 3.
** Brainless, a special perk in the Fallout: New Vegas add-on Old World Blues.
** Big Brained, a special perk in the Fallout: New Vegas add-on Old World Blues.
** Braintree, a town in the Boston area, mentioned in Fallout 4.