Thought I'd keep this under spoiler tags for those who don't want anything revealed for them without playing the game themselves.
Not much to highlight, just one minor detail that doesn't seem to have been discussed in here yet.
- Companions (Fighters' Guild), Thieves' Guild, Dark Brotherhood and College of Winterhold (Mages' Guild) being the 4 major guilds every "hardcore/diehard" player of ES III: Morrowind or ES IV: Oblivion knows existed in previous games, will be returning.
Also, all achievements (source is linked, just click the green text, and you'll know it's legit. ):
Elder Scrolls V: Skyrim Achievements
<table id="dataTable" width="638" cellpadding="0" cellspacing="0"><tbody><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP4JRnM=.jpg</td><td class="ac2" height="20">
Unbound</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Unbound"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (25) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP-pvuA=.jpg</td><td class="ac2" height="20">
Bleak Falls Barrow</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Bleak Falls Barrow"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (5) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP3It1U=.jpg</td><td class="ac2" height="20">
The Way of the Voice</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "The Way of the Voice"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPwoT8Y=.jpg</td><td class="ac2" height="20">
Diplomatic Immunity</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Diplomatic Immunity"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP8PW8g=.jpg</td><td class="ac2" height="20">
Alduin's Wall</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Alduin's Wall"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP7vo1s=.jpg</td><td class="ac2" height="20">
Elder Knowledge</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Elder Knowledge"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (7) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP1RTpo=.jpg</td><td class="ac2" height="20">
The Fallen</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "The Fallen"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (4) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP9wRy8=.jpg</td><td class="ac2" height="20">
Dragonslayer</td><td class="ac4" align="right">
50 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Dragonslayer"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (12) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP6Qv7w=.jpg</td><td class="ac2" height="20">
Take Up Arms</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Join the Companions</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (6) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPsyVEU=.jpg</td><td class="ac2" height="20">
Blood Oath</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Become a member of the Circle</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (14) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPrSrNY=.jpg</td><td class="ac2" height="20">
Glory of the Dead</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Glory of the Dead"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPjzpWM=.jpg</td><td class="ac2" height="20">
Gatekeeper</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Join the College of Winterhold</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (4) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPshPC8=.jpg</td><td class="ac2" height="20">
Revealing the Unseen</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Revealing the Unseen"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPrBxLw=.jpg</td><td class="ac2" height="20">
The Eye of Magnus</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "The Eye of Magnus"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (4) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPjgzQk=.jpg</td><td class="ac2" height="20">
Taking Care of Business</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Join the Thieves Guild</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (5) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPkANZo=.jpg</td><td class="ac2" height="20">
Darkness Returns</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Darkness Returns"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPyi3mM=.jpg</td><td class="ac2" height="20">
One with the Shadows</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Returned the Thieves Guild to its former glory</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (9) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP1CJvA=.jpg</td><td class="ac2" height="20">
With Friends Like These…</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Join the Dark Brotherhood</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (17) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP9jL0U=.jpg</td><td class="ac2" height="20">
Bound Until Death</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Bound Until Death"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP6D19Y=.jpg</td><td class="ac2" height="20">
Hail Sithis!</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete "Hail Sithis!"</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP2kw9g=.jpg</td><td class="ac2" height="20">
Taking Sides</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Join the Stormcloaks or the Imperial Army</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (15) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPxEO0s=.jpg</td><td class="ac2" height="20">
War Hero</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Capture Fort Sungard or Fort Greenwall</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (6) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP-61oo=.jpg</td><td class="ac2" height="20">
Hero of Skyrim</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Capture Solitude or Windhelm</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP3b3z8=.jpg</td><td class="ac2" height="20">
Sideways</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete 10 side quests</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (4) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPw7J6w=.jpg</td><td class="ac2" height="20">
Hero of the People</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Complete 50 Misc Objectives</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (8) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPmZzFU=.jpg</td><td class="ac2" height="20">
Hard Worker</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Chop wood, mine ore, and cook food</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (22) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPh5NMY=.jpg</td><td class="ac2" height="20">
Thief</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Pick 50 locks and 50 pockets</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (32) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPpYPXM=.jpg</td><td class="ac2" height="20">
Snake Tongue</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Successfully persuade, bribe, and intimidate</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP2uxW0=.jpg</td><td class="ac2" height="20">
Blessed</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Select a Standing Stone blessing</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (4) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPxOPf4=.jpg</td><td class="ac2" height="20">
Standing Stones</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Find 13 Standing Stones</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP5vNEs=.jpg</td><td class="ac2" height="20">
Citizen</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Buy a house</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (15) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP+PzNg=.jpg</td><td class="ac2" height="20">
Wanted</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Escape from jail</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (12) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPotJyE=.jpg</td><td class="ac2" height="20">
Married</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Get married</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (33) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPvN37I=.jpg</td><td class="ac2" height="20">
Artificer</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Make a smithed item, an enchanted item, and a potion</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPns1gc=.jpg</td><td class="ac2" height="20">
Master Criminal</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Bounty of 1000 gold in all nine holds</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (13) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPgMLpQ=.jpg</td><td class="ac2" height="20">
Golden Touch</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Have 100,000 gold</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (11) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPsrOpo=.jpg</td><td class="ac2" height="20">
Delver</td><td class="ac4" align="right">
40 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Clear 50 dungeons</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (12) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPrLwgk=.jpg</td><td class="ac2" height="20">
Skill Master</td><td class="ac4" align="right">
40 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Get a skill to 100</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (6) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPl1L8g=.jpg</td><td class="ac2" height="20">
Explorer</td><td class="ac4" align="right">
40 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Discover 100 Locations</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (5) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPtUJn0=.jpg</td><td class="ac2" height="20">
Reader</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Read 50 Skill Books</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPq03u4=.jpg</td><td class="ac2" height="20">
Daedric Influence</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Acquire a Daedric Artifact</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP8WNRc=.jpg</td><td class="ac2" height="20">
Oblivion Walker</td><td class="ac4" align="right">
30 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Collect 15 Daedric Artifacts</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (19) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP72zYQ=.jpg</td><td class="ac2" height="20">
Dragon Soul</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Absorb a dragon soul</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPzXxDE=.jpg</td><td class="ac2" height="20">
Dragon Hunter</td><td class="ac4" align="right">
20 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Absorb 20 dragon souls</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (9) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP+89cQ=.jpg</td><td class="ac2" height="20">
Words of Power</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Learn all three words of a shout</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (8) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UP5cDVc=.jpg</td><td class="ac2" height="20">
Thu'um Master</td><td class="ac4" align="right">
40 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Learn 20 shouts</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (8) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPx9BOI=.jpg</td><td class="ac2" height="20">
Apprentice</td><td class="ac4" align="right">
5 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Reach Level 5</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (2) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPv+5q4=.jpg</td><td class="ac2" height="20">
Adept</td><td class="ac4" align="right">
10 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Reach Level 10</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (1) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPg-F4g=.jpg</td><td class="ac2" height="20">
Expert</td><td class="ac4" align="right">
25 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Reach Level 25</td><td class="ac3" align="right">
http://www.xbox360achievements.org/i...s/comments.gif (3) </td></tr><tr><td rowspan="2" class="ac1">
http://www.xbox360achievements.org/i...8/UPnf7xs=.jpg</td><td class="ac2" height="20">
Master</td><td class="ac4" align="right">
50 http://www.xbox360achievements.org/images/site/gp-g.png</td></tr><tr><td class="ac3" height="40">Reach Level 50</td><td class="ac3" align="right">
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