1 Factions:
4 confirmed playable guilds. Likely more factions (quest based) to follow.
The College of Winterhold (mages guild)
The Companions (fighters guild)
The Thieves' Guild
The Dark Brotherhood
Confirmed non playable faction:
Necromancers
Factions not confirmed as either playable or non playable:
Riverwood Tavern Warrior Clan
Stormcloaks
The Shield-Brother
2. Character development
a. Skills
There are 18 skills in Skyrim.
Warrior-type Skills: Smithing, Heavy Armor, Block, Two-handed, One-Handed and Archery.
Mage-type Skills: Enchanting, Destruction, Alteration, Conjuration, Restoration and Illusion.
Thief-type Skills: Alchemy, Light Armor, Speech, Sneak, Lockpicking and Pickpocketing
b. There are no classes, attributes, or major or minor skills. You do not pick skills in the beginning of the game. You just level up as you play.
c. Health, Magicka, and Stamina are the stats that the player chooses to level up after each increased level
d. Perks. You define and separate your character by choosing gameplay abilities at every level up. These abilities are called perks. You gain a perk point at every level up spend, however, you do not necessarily have to spend this perk point immediately. There are 280 perks in the game (including ranks of perks). The mathematical cap has been calculated as being 75, therefore you can choose 75 perks (out of 280) in the end. However, it has been said that leveling past 50 is excruciatingly difficult.
3. Gameplay:
a. General:
Magnetism draws melee weapons towards enemies to lessen the chance of hitting allies and companions
You can dual wield one handed weapons. You can use 2 magical staves if you wish. You cannot block while dual wielding, however, you can block if holding a torch alongside your one handed weapon. Now word on whether or not you can dual wield shields.
No decapitation or limb severing
No localization of damage (a hit to the head is the same as a hit to the chest)
There are special kill animations that can be inflicted on enemies. These animations vary dependent upon your weapon and the enemy being fought. Some animations pull the into 3rd person mode.
There's a button dedicated to sprinting that quickly drains stamina.
There is now regenerative health in addition to resting, sleeping, potions, and magic. The health regen takes ridiculously long and does not replace other forms.
b. Archery:
Bows deal significantly more damage than in Oblivion or Morrowind, you can kill many enemies in one or two shots. As consequence of this change, the arrow economy has changed drastically. Arrows are now more rare and you will not see character hauling around 600 + arrows.
Draw time of an arrow has been significantly increased. It takes much longer to shoot an arrow.
A confirmed Archery perk is to slow time when aiming for a shot.
If an enemy gets too close for comfort, you can punch the enemy in the face with the bow.
C. Melee:
Backpeddling speed severely reduced
staggers and sways with each step and each weapon blow
There are non lethal bar fights that one can take part in in local tavern
Power attacks activate by holding down the attack button (shield bash, spinning flurry, heavy slash charge)
Daggers do very high damage from behind while sneaking (sometimes triggering a throat slash or back stab animation)
D. Magic:
5 Magic Schools: Destruction, Alteration, Conjuration, Restoration & Illusion.
There are over 85 spells to choose from.
You can dual-wield spells or use two different spells, one on either hand
Some spells can be learned by reading spell tomes, while others can be bought from merchants.
There's a wide range of different ways to cast similar spells, like setting up a fire trap, sending a fireball or spraying fire in front of you like a flamethrower.
If you cast a frost spell, you'll see the effects on the enemy's skin. If you're wielding the flame spell like a flame thrower, the environment will catch fire for a short while and burn anything that comes into contact with it.
Fire deals the highest amount of damage, lighting/shock deals less damage, but drains the enemy's magicka, while frost deals the least damage, but drains stamina and slows down enemies physically.
Light magic (from staves at least) can stick to walls.
There is NO spell creation. I repeat: NO SPELL CREATION IN SKYRIM!!!!
E. Dragon shouts:
Extremely powerful unlockable effects that the character (Dovahkiin)has access to.
You learn a new shout by first discovering a dragon word in the dragon language on a word wall within a dragon temple. You must find all three words to a phrase to have the chance to unlock the shout. Additionally, shouts can only be unlocked once the player purchases the shouts with dragon souls -- which the player obtains by slaying a dragon.
Known Dragon Shouts:
Fire Breath
Slow Time
Quick Sprint
Teleportation
Storm Call
Summon Dragon
Force Push
Animal Aid (bewitch animals into fighting for you)
"Ice Crystals"
There are over 20 different shouts and each one has a different cooldown time
F. Armor and Weapons
No Weapon or Armor degeneration
Significantly more unique items than in Oblivion
Each race has a special set of armor (more than simply Elven armor and Orcish armor this time)
Greaves and Cuirass combined into one set
4. Races and Character creation.
All ten races return. Breton, Nord, Redguard, Imperial, Bosmer, Altmer, Orsimer, Dunmer, Khajiit, and Argonian.
Confirmed Racial Ability Bonuses
Bosmer: Poison immunity
Argonian: Underwater breathing, Health regen bonus (called "hist healing")
Khajiit: Bonus to hand to hand combat due to their claws
Nord: "Berserker" most likely the ability to temporarily increase strength, damage done, and resistance to weaponry.
More than fifty beards to add to male characters.
Argonians have the option to be feathered
Hundreds of facial tattoo options
Creation is controlled with sliders (weight, age, facial features, muscle mass, ect)
Height is determined by your chosen race, not by any slider.
All Race pics:
Faces of Skyrim
Terrible leaked image of char creation screen
5. Geography:
Distinct geographical regions and styles: Volcanic regions, Tundra, Snow/Ice, Pine Forest, Fall Forest, Marsh, Canyon, Glaciers.
5 Major Cities: (all on the map)
Many smaller townships (Riverwood shown in the E3 and Pax demo is one of these smaller townships)
New information tidbits:
Vampires confirmed
Marriage and gay marriage
You can catch salmon and other fish with your bare hands in rivers and streams
You can set butterflies on fire
70+ voice actors in Skyrim (compared to Oblivion's 14 or so) -- Among them is the great and respected actor, Max Von Sydow.
Your character shouts, grunts, and laughs during battle