Skill ranks can only have values from 1 to 10. Skill bonuses applied from the character's race or other sources are ranks that have been applied for "free".
Skill ranks become more expensive to purchase at higher ranks, doubling every 3 ranks. A higher governing attribute pushes the point they start doubling to a higher rank, while lower governing attributes push the doubling point lower.
How well you use two handed weapons. This is analagous to the Two Handed weapon line from ESO.
How well you use One handed weapons. This represents the offensive component of the One Hand and Shield weapon line from ESO; it has been separated for characters who don't necessarily use a shield.
How well you protect yourself with a shield. This represents the defensive component of the One Hand and Shield weapon line from ESO; it is also analogous to the Block skill from earlier games. (MW, OB, SK)
How well you use two weapons at once. This is analagous to the Dual Wield weapon line from ESO.
How well you use bows. This is analagous to the Bow weapon line from ESO.
How well you can fight or grapple with your bare hands. This is here to give characters a non-weapon fighting options. It is analagous to the Hand to Hand skill that appeared in earlier games. (DF, MW, OB)
How well you use light armor - robes and clothing. This is analagous to the Light Armor skill line from ESO, as well as the Unarmored skill from Morrowind.
How well you use medium armor - leather. This is analagous to the Medium Armor skill line from ESO. This armor type was known as Light Armor in older Elders Scrolls games. (MW, OB, SK)
How well you use heavy armor - metal. This is analagous to the Heavy Armor skill line from ESO.
How well you manipulate the natural world and its properties. This school has appeared in every main Elder Scrolls game since Daggerfall.
How well you dominate the wills of daedra or the undead, or summon otherworldly weapons and armor. This school has appeared in every main Elder Scrolls game since Morrowind.
How well you use magic for destructive ends. This school has appeared in every main Elder Scrolls game since Daggerfall.
How well you alter the perceptions and thoughts of sentient beings. This school has appeared in every main Elder Scrolls game since Daggerfall.
How well you focus mystical energy into feats of telekinesis or perception. This school has appeared in every main Elder Scrolls game since Daggerfall.
How well you restore or bolster the body. This school has appeared in every main Elder Scrolls game since Daggerfall.
How well you jump, climb, and avoid damage from falls. This skill appeared in Morrowind and Oblivion.
How well you can run and swim. This skill appeared in Morrowind and Oblivion.
How well you can pick pockets or locks. This skill is analogous to the Legerdemain skill line in ESO.
How well you barter and haggle. This skill appeared in Daggerfall, Morrowind, and Oblivion.
Noticing details about the world around you. This skill is not from other games, but some way to rate a character's attentiveness was needed.
How well you can move unseen and unheard. This skill has appeared in every main Elder Scrolls game since Daggerfall (but it was known as Stealth there).
How well you can influence others by admiring, intimidating, or taunting them. This skill appeared in Morrowind, Oblivion, and Skyrim (as Speech).
How well you can brew potions and poisons, as well as recognize and use alchemical ingredients. This skill is analogous to the Alchemy skill line in ESO.
How well you can create metal items. This skill is analogous to the Blacksmithing skill line in ESO.
How well you can make clothing and leather items. This skill is analogous to the Clothing skill line in ESO.
How well you can add enchantments to items. This skill is analogous to the Enchanting skill line in ESO.
How well you can create jewelry. This skill is analogous to the Jewelry Crafting skill line in ESO.
How well you can prepare food and drink. This skill is analogous to the Provisioning skill line in ESO.
How well you can create wooden items. This skill is analogous to the Woodworking skill line in ESO.
Knowledge skills are a special type of skill that represent specialized study or experience. Intelligence is always their governing attribute.
Knowledge skills also have a difficulty score to represent how hard they are to learn. Difficulty can be Easy, Moderate, Hard, or even Esoteric for the most obscure items. The difficulty system makes some skills only practical very intelligent/scholarly characters.
Difficulty score works against Intelligence as the skill’s governing attribute for cost increases.
Studying the history of the Altmer people, as well as their elvish language.
Knowledge of the continent of Akavir.
Studying the history of the extinct Ayleid people, and their language Ayleidoon.
A form of dark magic to manipulate blood, most famously used by vampires.
Studying the history of the Bosmer people, as well as the Wild Hunt.
Studying the history of the Breton people and their mixed man/mer ancestry.
Studying the secrets of the daedra - their society/planes, summoning them, and their language.
Studying the secrets of the dragon lords of the Merethic Era, and their language which is now only used by the Greybeards.
Studying the history of the Dunmer people, as well as their writings in Dunmeris or Ald Chimeris.
Studying the secrets of the Dwemer, who disappeared in the First Era.
Studying the history of the Falmer, and what little remains of their culture.
Treating and dressing wounds in the field.
Dealing with animals, either tame or wild.
Studying the intricacies of the Hist, as well as Jel, the language of the Argonians.
Studying the history of the Imperial people, and the Alessian Empire that came before them.
Studying the history of the Khajiit people, as well as their Ta'agra language.
Studying the history of the Kothringi people, who were wiped out by a plague earlier in the Second Era.
Knowledge of the maormer, or sea elves, as well as their language, Pyandonean.
Studying the origins of all the people of Tamriel, as well as their proto-language, Ehlnofex.
Study of magic for harnessing and controlling nature, like the Wyresses of Daggerafall.
Knowledge of summoning and/or controlling the dead.
Studying the history of the early men who settled Tamriel, the Nedes.
Studying the history of the Nords and their ancestral homeland of Atmora.
Studying the history of the pariah mer, or Orcs, as well as the modern and archaic forms of their language.
Knowledge of the people, customs, and religion of the Reach.
Studying the history of the Redguard people and their ancestral homeland of Yokuda.
An obscure form of magic which is used by Nocturnal, but can also be learned by mortals in limited forms.
Studying the history of the Sload, a slug-like race that live over the seas southwest of Tamriel.
Living off the land.