Unlike in Fallout 3, the Perk Rate in Fallout: New Vegas is one perk every two levels. To counter how easy it was to max out the player's skills in Fallout 3, most of the skill-boosting perks have been removed or replaced. There are 88 regular perks, 8 companion perks, 16 challenge perks, and 18 special perks. Additionally, 6 of the regular perks can be chosen more than once, such as Intense Training. Only regular perks may be selected during level up. Other types of perks are granted through completing various tasks, and do not count against the limit of regular perks. You can get up to a total of 25 non-challenge perks with all 4 DLCs installed. With all DLCs installed there are 117 regular perks.