Endurance
This particular attribute is responsible for your sprinting, health points, radiation resistance, and even the effects of food and drinks.
Toughness (Requires END 1)- Five ranks each with increasing Damage Resistance starting at +10 and ending at +50.
Lead Belly (Requires END 2)- Decreases the radiation received from eating radiated food and beverages. There are three ranks with the third rank completely ignoring all radiation.
Life Giver (Requires END 3)- Increases your maximum Health. Each of the three ranks increases your health by 20 points with the third rank adding health regeneration.
Chem Resistant (Requires END 4)- Rank one lowers your chance of becoming addicted to Chems by half, while the second rank completely removes the chance.
Aquaboy/Aquagirl (Requires END 5)- No more radiation from jumping into pools of water, plus you can now breath under there too. The second rank makes you completely undetectable while fully submerged.
Rad Resistant (Requires END 6)- Each of the the three ranks increases your Radiation Resistance starting at +10 and ending at +30.
Adamantium Skeleton (Requires END 7)- Decrease limb damage received by 30% and 60% for the first two ranks. The third rank eliminates all limb damage.
Cannibal (Requires END 8)- You can know eat humanoid enemies to restore health. Rank one lets you eat humans. Rank two lets you eat Ghouls and Super Mutants. Rank three greatly increases the amount of health you receive from all three.
Ghoulish (Requires END 9)- Radiation now restores your health. Each of the three ranks increases the amount of health restored while the final rank also adds the chance of Feral Ghouls becoming friendly.
Solar Powered (Requires END 10)- Increases Strength and Endurance between the hours of 6 a.m. and 6 p.m. by two. Ranks two and three will add radiation damage regeneration and health regeneration when in sunlight respectively.