Fallout: New Vegas Perks

General information
Unlike Fallout 3, in Fallout: New Vegas you gain perks every two levels. There are 88 regular perks, 8 companion perks and other unknown amount of quest perks. To counter how easy it was to max out the player's skills in Fallout 3, most of the skill-boosting perks from Fallout 3 have been removed and replaced.

Companion perks
Fallout: New Vegas is not the first Fallout game to introduce the concept of companions having perks, but is the first to have perks that affect the party as a whole.